./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y --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 c7c4bef8c60b810569a22d8a73144498437260dfbc0e4b7320d169bed033790e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:48:19,306 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:48:19,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:48:19,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:48:19,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:48:19,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:48:19,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:48:19,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:48:19,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:48:19,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:48:19,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:48:19,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:48:19,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:48:19,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:48:19,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:48:19,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:48:19,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:48:19,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:48:19,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:48:19,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:48:19,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:48:19,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:48:19,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:48:19,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:48:19,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:48:19,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:48:19,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:48:19,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:48:19,444 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:48:19,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:48:19,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:48:19,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:48:19,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:48:19,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:48:19,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:48:19,452 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:48:19,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:48:19,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:48:19,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:48:19,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:48:19,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:48:19,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:48:19,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:48:19,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:48:19,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:48:19,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:48:19,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:48:19,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:48:19,513 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:48:19,513 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:48:19,514 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:48:19,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:48:19,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:48:19,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:48:19,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:48:19,516 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:48:19,517 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:48:19,517 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:48:19,517 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:48:19,517 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:48:19,517 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:48:19,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:48:19,518 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:48:19,518 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:48:19,518 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:48:19,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:48:19,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:48:19,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:48:19,521 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:48:19,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:48:19,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:48:19,521 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_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7c4bef8c60b810569a22d8a73144498437260dfbc0e4b7320d169bed033790e [2021-11-13 18:48:19,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:48:19,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:48:19,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:48:19,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:48:19,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:48:19,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:48:19,932 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/71c92d7cf/f833a9b54eda4f6093c2f5356bdfd8cc/FLAG6e77b8174 [2021-11-13 18:48:21,015 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:48:21,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:48:21,071 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/71c92d7cf/f833a9b54eda4f6093c2f5356bdfd8cc/FLAG6e77b8174 [2021-11-13 18:48:21,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/71c92d7cf/f833a9b54eda4f6093c2f5356bdfd8cc [2021-11-13 18:48:21,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:48:21,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:48:21,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:48:21,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:48:21,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:48:21,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:48:21" (1/1) ... [2021-11-13 18:48:21,459 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@598b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:21, skipping insertion in model container [2021-11-13 18:48:21,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:48:21" (1/1) ... [2021-11-13 18:48:21,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:48:21,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:48:24,077 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[381679,381692] [2021-11-13 18:48:24,103 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[383339,383352] [2021-11-13 18:48:24,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:48:24,284 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:48:25,566 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[381679,381692] [2021-11-13 18:48:25,575 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[383339,383352] [2021-11-13 18:48:25,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:48:25,678 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:48:25,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25 WrapperNode [2021-11-13 18:48:25,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:48:25,681 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:48:25,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:48:25,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:48:25,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:25,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:48:26,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:48:26,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:48:26,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:48:26,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:26,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:27,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:48:27,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:48:27,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:48:27,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:48:27,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (1/1) ... [2021-11-13 18:48:27,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:48:27,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:27,160 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:48:27,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:48:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:48:27,302 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:48:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:48:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:48:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:48:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:48:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:48:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:48:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:48:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:48:27,303 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:48:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:48:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:48:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:48:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:48:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:48:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:48:27,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:48:35,270 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:48:35,270 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:48:35,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:48:35 BoogieIcfgContainer [2021-11-13 18:48:35,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:48:35,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:48:35,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:48:35,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:48:35,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:48:21" (1/3) ... [2021-11-13 18:48:35,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77cb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:48:35, skipping insertion in model container [2021-11-13 18:48:35,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:48:25" (2/3) ... [2021-11-13 18:48:35,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e77cb8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:48:35, skipping insertion in model container [2021-11-13 18:48:35,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:48:35" (3/3) ... [2021-11-13 18:48:35,287 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:48:35,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:48:35,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:48:35,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:48:35,386 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 [2021-11-13 18:48:35,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:48:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 18:48:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:35,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:35,470 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] [2021-11-13 18:48:35,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-11-13 18:48:35,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:35,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849346991] [2021-11-13 18:48:35,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:35,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:35,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:35,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849346991] [2021-11-13 18:48:35,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849346991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:35,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:35,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:48:35,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724606936] [2021-11-13 18:48:35,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:35,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:48:35,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:48:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:35,938 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:36,834 INFO L93 Difference]: Finished difference Result 4664 states and 8635 transitions. [2021-11-13 18:48:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:48:36,838 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:36,879 INFO L225 Difference]: With dead ends: 4664 [2021-11-13 18:48:36,879 INFO L226 Difference]: Without dead ends: 2286 [2021-11-13 18:48:36,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:48:36,899 INFO L933 BasicCegarLoop]: 4210 mSDtfsCounter, 4311 mSDsluCounter, 12318 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 340.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4321 SdHoareTripleChecker+Valid, 16528 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 98.73ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 447.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:36,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4321 Valid, 16528 Invalid, 415 Unknown, 0 Unchecked, 98.73ms Time], IncrementalHoareTripleChecker [50 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 447.57ms Time] [2021-11-13 18:48:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-11-13 18:48:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2255. [2021-11-13 18:48:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2229 states have (on average 1.848362494392104) internal successors, (4120), 2232 states have internal predecessors, (4120), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 18:48:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4154 transitions. [2021-11-13 18:48:37,086 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4154 transitions. Word has length 69 [2021-11-13 18:48:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:37,087 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4154 transitions. [2021-11-13 18:48:37,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4154 transitions. [2021-11-13 18:48:37,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:37,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:37,093 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] [2021-11-13 18:48:37,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:48:37,093 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:37,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2022317526, now seen corresponding path program 1 times [2021-11-13 18:48:37,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:37,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169458263] [2021-11-13 18:48:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:37,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:37,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:37,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169458263] [2021-11-13 18:48:37,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169458263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:37,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:37,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:48:37,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384796429] [2021-11-13 18:48:37,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:37,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:48:37,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:48:37,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:48:37,345 INFO L87 Difference]: Start difference. First operand 2255 states and 4154 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:37,956 INFO L93 Difference]: Finished difference Result 2415 states and 4399 transitions. [2021-11-13 18:48:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:48:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:37,977 INFO L225 Difference]: With dead ends: 2415 [2021-11-13 18:48:37,977 INFO L226 Difference]: Without dead ends: 2291 [2021-11-13 18:48:37,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:48:37,985 INFO L933 BasicCegarLoop]: 4146 mSDtfsCounter, 4304 mSDsluCounter, 12132 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 278.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4314 SdHoareTripleChecker+Valid, 16278 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.03ms SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:37,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4314 Valid, 16278 Invalid, 445 Unknown, 0 Unchecked, 48.03ms Time], IncrementalHoareTripleChecker [72 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 348.47ms Time] [2021-11-13 18:48:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-11-13 18:48:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2255. [2021-11-13 18:48:38,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2229 states have (on average 1.847913862718708) internal successors, (4119), 2232 states have internal predecessors, (4119), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 18:48:38,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4153 transitions. [2021-11-13 18:48:38,091 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4153 transitions. Word has length 69 [2021-11-13 18:48:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:38,092 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4153 transitions. [2021-11-13 18:48:38,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4153 transitions. [2021-11-13 18:48:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:38,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:38,099 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] [2021-11-13 18:48:38,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:48:38,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:38,101 INFO L85 PathProgramCache]: Analyzing trace with hash -635532116, now seen corresponding path program 1 times [2021-11-13 18:48:38,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:38,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809052932] [2021-11-13 18:48:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:38,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:38,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:38,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:38,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809052932] [2021-11-13 18:48:38,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809052932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:38,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:38,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:48:38,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97126451] [2021-11-13 18:48:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:38,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:48:38,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:48:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:48:38,279 INFO L87 Difference]: Start difference. First operand 2255 states and 4153 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:38,961 INFO L93 Difference]: Finished difference Result 2408 states and 4386 transitions. [2021-11-13 18:48:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:48:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:38,977 INFO L225 Difference]: With dead ends: 2408 [2021-11-13 18:48:38,978 INFO L226 Difference]: Without dead ends: 2284 [2021-11-13 18:48:38,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:48:38,981 INFO L933 BasicCegarLoop]: 4131 mSDtfsCounter, 4303 mSDsluCounter, 12130 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 313.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4313 SdHoareTripleChecker+Valid, 16261 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.73ms SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 399.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:38,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4313 Valid, 16261 Invalid, 405 Unknown, 0 Unchecked, 36.73ms Time], IncrementalHoareTripleChecker [74 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 399.75ms Time] [2021-11-13 18:48:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-11-13 18:48:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2255. [2021-11-13 18:48:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2229 states have (on average 1.8465679676985196) internal successors, (4116), 2232 states have internal predecessors, (4116), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 18:48:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4150 transitions. [2021-11-13 18:48:39,059 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4150 transitions. Word has length 69 [2021-11-13 18:48:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:39,060 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4150 transitions. [2021-11-13 18:48:39,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:39,060 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4150 transitions. [2021-11-13 18:48:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:39,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:39,062 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] [2021-11-13 18:48:39,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:48:39,063 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:39,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:39,063 INFO L85 PathProgramCache]: Analyzing trace with hash 240486890, now seen corresponding path program 1 times [2021-11-13 18:48:39,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:39,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919397545] [2021-11-13 18:48:39,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:39,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:39,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:39,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919397545] [2021-11-13 18:48:39,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919397545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:39,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:39,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:48:39,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834548206] [2021-11-13 18:48:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:48:39,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:48:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:48:39,153 INFO L87 Difference]: Start difference. First operand 2255 states and 4150 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:39,661 INFO L93 Difference]: Finished difference Result 2411 states and 4382 transitions. [2021-11-13 18:48:39,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:48:39,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:39,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:39,680 INFO L225 Difference]: With dead ends: 2411 [2021-11-13 18:48:39,680 INFO L226 Difference]: Without dead ends: 2287 [2021-11-13 18:48:39,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:48:39,691 INFO L933 BasicCegarLoop]: 4132 mSDtfsCounter, 4295 mSDsluCounter, 12127 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4305 SdHoareTripleChecker+Valid, 16259 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.15ms SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 322.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:39,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4305 Valid, 16259 Invalid, 420 Unknown, 0 Unchecked, 34.15ms Time], IncrementalHoareTripleChecker [78 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 322.63ms Time] [2021-11-13 18:48:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-11-13 18:48:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2255. [2021-11-13 18:48:39,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2255 states, 2229 states have (on average 1.8461193360251233) internal successors, (4115), 2232 states have internal predecessors, (4115), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-13 18:48:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 4149 transitions. [2021-11-13 18:48:39,793 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 4149 transitions. Word has length 69 [2021-11-13 18:48:39,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:39,793 INFO L470 AbstractCegarLoop]: Abstraction has 2255 states and 4149 transitions. [2021-11-13 18:48:39,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 4149 transitions. [2021-11-13 18:48:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:39,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:39,804 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] [2021-11-13 18:48:39,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:48:39,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1778826920, now seen corresponding path program 1 times [2021-11-13 18:48:39,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:39,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117638424] [2021-11-13 18:48:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:39,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:39,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:39,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117638424] [2021-11-13 18:48:39,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117638424] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:39,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:39,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:48:39,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756723437] [2021-11-13 18:48:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:39,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:48:39,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:39,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:48:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:39,941 INFO L87 Difference]: Start difference. First operand 2255 states and 4149 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:40,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:40,813 INFO L93 Difference]: Finished difference Result 2575 states and 4616 transitions. [2021-11-13 18:48:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:48:40,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:40,831 INFO L225 Difference]: With dead ends: 2575 [2021-11-13 18:48:40,831 INFO L226 Difference]: Without dead ends: 2451 [2021-11-13 18:48:40,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:48:40,834 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4475 mSDsluCounter, 16596 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 448.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4489 SdHoareTripleChecker+Valid, 20842 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.40ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 539.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4489 Valid, 20842 Invalid, 809 Unknown, 0 Unchecked, 47.40ms Time], IncrementalHoareTripleChecker [91 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 539.80ms Time] [2021-11-13 18:48:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-11-13 18:48:40,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2372. [2021-11-13 18:48:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2328 states have (on average 1.8290378006872852) internal successors, (4258), 2332 states have internal predecessors, (4258), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 28 states have call predecessors, (30), 27 states have call successors, (30) [2021-11-13 18:48:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4317 transitions. [2021-11-13 18:48:40,930 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4317 transitions. Word has length 69 [2021-11-13 18:48:40,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:40,930 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 4317 transitions. [2021-11-13 18:48:40,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4317 transitions. [2021-11-13 18:48:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:40,932 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:40,932 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] [2021-11-13 18:48:40,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:48:40,933 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:40,933 INFO L85 PathProgramCache]: Analyzing trace with hash -249759190, now seen corresponding path program 1 times [2021-11-13 18:48:40,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:40,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819148413] [2021-11-13 18:48:40,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:40,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:41,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:48:41,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:41,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819148413] [2021-11-13 18:48:41,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819148413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:41,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:41,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:48:41,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577977019] [2021-11-13 18:48:41,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:41,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:48:41,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:48:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:41,007 INFO L87 Difference]: Start difference. First operand 2372 states and 4317 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:41,817 INFO L93 Difference]: Finished difference Result 2945 states and 5148 transitions. [2021-11-13 18:48:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:48:41,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-13 18:48:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:41,836 INFO L225 Difference]: With dead ends: 2945 [2021-11-13 18:48:41,837 INFO L226 Difference]: Without dead ends: 2705 [2021-11-13 18:48:41,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:48:41,932 INFO L933 BasicCegarLoop]: 4302 mSDtfsCounter, 4469 mSDsluCounter, 12281 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 454.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4493 SdHoareTripleChecker+Valid, 16583 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.23ms SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 535.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:41,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4493 Valid, 16583 Invalid, 670 Unknown, 0 Unchecked, 47.23ms Time], IncrementalHoareTripleChecker [83 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 535.50ms Time] [2021-11-13 18:48:41,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2705 states. [2021-11-13 18:48:42,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2705 to 2587. [2021-11-13 18:48:42,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2587 states, 2507 states have (on average 1.796569605105704) internal successors, (4504), 2514 states have internal predecessors, (4504), 52 states have call successors, (52), 25 states have call predecessors, (52), 26 states have return successors, (55), 49 states have call predecessors, (55), 50 states have call successors, (55) [2021-11-13 18:48:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2587 states to 2587 states and 4611 transitions. [2021-11-13 18:48:42,042 INFO L78 Accepts]: Start accepts. Automaton has 2587 states and 4611 transitions. Word has length 69 [2021-11-13 18:48:42,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:42,043 INFO L470 AbstractCegarLoop]: Abstraction has 2587 states and 4611 transitions. [2021-11-13 18:48:42,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:48:42,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2587 states and 4611 transitions. [2021-11-13 18:48:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:48:42,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:42,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:48:42,047 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash -183919059, now seen corresponding path program 1 times [2021-11-13 18:48:42,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:42,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56059929] [2021-11-13 18:48:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:42,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:48:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:48:42,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:42,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56059929] [2021-11-13 18:48:42,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56059929] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:42,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425604908] [2021-11-13 18:48:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:42,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:42,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:42,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:42,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:48:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:48:42,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:42,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425604908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:42,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:42,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:48:42,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924200903] [2021-11-13 18:48:42,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:42,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:42,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:42,507 INFO L87 Difference]: Start difference. First operand 2587 states and 4611 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:48:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:42,613 INFO L93 Difference]: Finished difference Result 3476 states and 5871 transitions. [2021-11-13 18:48:42,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:42,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-11-13 18:48:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:42,634 INFO L225 Difference]: With dead ends: 3476 [2021-11-13 18:48:42,634 INFO L226 Difference]: Without dead ends: 3021 [2021-11-13 18:48:42,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:42,638 INFO L933 BasicCegarLoop]: 4156 mSDtfsCounter, 4104 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4104 SdHoareTripleChecker+Valid, 4321 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.32ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:42,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4104 Valid, 4321 Invalid, 12 Unknown, 0 Unchecked, 10.32ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 8.96ms Time] [2021-11-13 18:48:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3021 states. [2021-11-13 18:48:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3021 to 3009. [2021-11-13 18:48:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 2861 states have (on average 1.7483397413491786) internal successors, (5002), 2872 states have internal predecessors, (5002), 94 states have call successors, (94), 49 states have call predecessors, (94), 52 states have return successors, (101), 89 states have call predecessors, (101), 92 states have call successors, (101) [2021-11-13 18:48:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 5197 transitions. [2021-11-13 18:48:42,768 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 5197 transitions. Word has length 111 [2021-11-13 18:48:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:42,769 INFO L470 AbstractCegarLoop]: Abstraction has 3009 states and 5197 transitions. [2021-11-13 18:48:42,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:48:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 5197 transitions. [2021-11-13 18:48:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:48:42,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:42,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:42,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:42,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:42,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:42,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:42,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1076475891, now seen corresponding path program 1 times [2021-11-13 18:48:42,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:42,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365451887] [2021-11-13 18:48:42,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:42,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-13 18:48:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:48:43,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365451887] [2021-11-13 18:48:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365451887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324375841] [2021-11-13 18:48:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:43,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:43,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:43,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:48:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:48:43,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324375841] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:43,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169781323] [2021-11-13 18:48:43,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:43,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:43,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:43,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:43,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:43,496 INFO L87 Difference]: Start difference. First operand 3009 states and 5197 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:48:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:43,671 INFO L93 Difference]: Finished difference Result 4681 states and 7573 transitions. [2021-11-13 18:48:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-11-13 18:48:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:43,698 INFO L225 Difference]: With dead ends: 4681 [2021-11-13 18:48:43,698 INFO L226 Difference]: Without dead ends: 3805 [2021-11-13 18:48:43,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:43,703 INFO L933 BasicCegarLoop]: 4301 mSDtfsCounter, 148 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 8445 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:43,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 8445 Invalid, 13 Unknown, 0 Unchecked, 11.35ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 13.44ms Time] [2021-11-13 18:48:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-11-13 18:48:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 3805. [2021-11-13 18:48:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3805 states, 3526 states have (on average 1.6781055019852524) internal successors, (5917), 3542 states have internal predecessors, (5917), 175 states have call successors, (175), 95 states have call predecessors, (175), 102 states have return successors, (222), 171 states have call predecessors, (222), 173 states have call successors, (222) [2021-11-13 18:48:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3805 states to 3805 states and 6314 transitions. [2021-11-13 18:48:43,929 INFO L78 Accepts]: Start accepts. Automaton has 3805 states and 6314 transitions. Word has length 111 [2021-11-13 18:48:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:43,930 INFO L470 AbstractCegarLoop]: Abstraction has 3805 states and 6314 transitions. [2021-11-13 18:48:43,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:48:43,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3805 states and 6314 transitions. [2021-11-13 18:48:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 18:48:43,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:43,940 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:43,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:44,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:44,163 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:44,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1570377314, now seen corresponding path program 1 times [2021-11-13 18:48:44,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:44,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529787938] [2021-11-13 18:48:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:44,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:44,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-11-13 18:48:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-11-13 18:48:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-13 18:48:44,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529787938] [2021-11-13 18:48:44,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529787938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:44,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143245884] [2021-11-13 18:48:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:44,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:44,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:44,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:48:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:48:44,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:44,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143245884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:44,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:44,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:48:44,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848460506] [2021-11-13 18:48:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:44,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:44,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:44,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:44,813 INFO L87 Difference]: Start difference. First operand 3805 states and 6314 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:48:45,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:45,140 INFO L93 Difference]: Finished difference Result 7077 states and 10961 transitions. [2021-11-13 18:48:45,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:45,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-11-13 18:48:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:45,177 INFO L225 Difference]: With dead ends: 7077 [2021-11-13 18:48:45,177 INFO L226 Difference]: Without dead ends: 5409 [2021-11-13 18:48:45,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:45,185 INFO L933 BasicCegarLoop]: 4177 mSDtfsCounter, 4062 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4062 SdHoareTripleChecker+Valid, 4342 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:45,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4062 Valid, 4342 Invalid, 12 Unknown, 0 Unchecked, 12.01ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.89ms Time] [2021-11-13 18:48:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2021-11-13 18:48:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5373. [2021-11-13 18:48:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5373 states, 4838 states have (on average 1.5975609756097562) internal successors, (7729), 4866 states have internal predecessors, (7729), 331 states have call successors, (331), 187 states have call predecessors, (331), 202 states have return successors, (418), 323 states have call predecessors, (418), 329 states have call successors, (418) [2021-11-13 18:48:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 8478 transitions. [2021-11-13 18:48:45,481 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 8478 transitions. Word has length 143 [2021-11-13 18:48:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:45,483 INFO L470 AbstractCegarLoop]: Abstraction has 5373 states and 8478 transitions. [2021-11-13 18:48:45,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:48:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 8478 transitions. [2021-11-13 18:48:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:48:45,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:45,498 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, 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] [2021-11-13 18:48:45,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:45,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-13 18:48:45,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:45,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:45,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2104014644, now seen corresponding path program 1 times [2021-11-13 18:48:45,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:45,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105365897] [2021-11-13 18:48:45,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:45,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:48:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:48:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:48:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:48:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:48:45,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:45,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105365897] [2021-11-13 18:48:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105365897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:45,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959085712] [2021-11-13 18:48:45,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:45,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:45,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:45,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:48:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:48:46,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:46,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959085712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:46,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:46,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:46,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028131123] [2021-11-13 18:48:46,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:46,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:46,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:46,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:46,373 INFO L87 Difference]: Start difference. First operand 5373 states and 8478 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:48:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:46,651 INFO L93 Difference]: Finished difference Result 8993 states and 13632 transitions. [2021-11-13 18:48:46,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:46,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-11-13 18:48:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:46,697 INFO L225 Difference]: With dead ends: 8993 [2021-11-13 18:48:46,697 INFO L226 Difference]: Without dead ends: 5755 [2021-11-13 18:48:46,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:46,711 INFO L933 BasicCegarLoop]: 4143 mSDtfsCounter, 4081 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 4177 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.97ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:46,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4081 Valid, 4177 Invalid, 12 Unknown, 0 Unchecked, 10.97ms Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 13.49ms Time] [2021-11-13 18:48:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5755 states. [2021-11-13 18:48:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5755 to 5755. [2021-11-13 18:48:47,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5755 states, 5184 states have (on average 1.5576774691358024) internal successors, (8075), 5212 states have internal predecessors, (8075), 341 states have call successors, (341), 213 states have call predecessors, (341), 228 states have return successors, (430), 333 states have call predecessors, (430), 339 states have call successors, (430) [2021-11-13 18:48:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5755 states to 5755 states and 8846 transitions. [2021-11-13 18:48:47,082 INFO L78 Accepts]: Start accepts. Automaton has 5755 states and 8846 transitions. Word has length 160 [2021-11-13 18:48:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:47,083 INFO L470 AbstractCegarLoop]: Abstraction has 5755 states and 8846 transitions. [2021-11-13 18:48:47,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:48:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 5755 states and 8846 transitions. [2021-11-13 18:48:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:48:47,097 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:47,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:47,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:47,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:47,323 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:47,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1950386513, now seen corresponding path program 1 times [2021-11-13 18:48:47,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:47,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948080798] [2021-11-13 18:48:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:47,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:47,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 18:48:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:48:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:48:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:48:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:48:47,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:47,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948080798] [2021-11-13 18:48:47,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948080798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:47,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944968789] [2021-11-13 18:48:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:47,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:47,454 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:47,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:48:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:48:47,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:48:48,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:48,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944968789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:48,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:48,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:48,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285406789] [2021-11-13 18:48:48,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:48,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:48,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:48,045 INFO L87 Difference]: Start difference. First operand 5755 states and 8846 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:48,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:48,414 INFO L93 Difference]: Finished difference Result 8877 states and 13029 transitions. [2021-11-13 18:48:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:48,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-11-13 18:48:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:48,442 INFO L225 Difference]: With dead ends: 8877 [2021-11-13 18:48:48,442 INFO L226 Difference]: Without dead ends: 6111 [2021-11-13 18:48:48,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:48,455 INFO L933 BasicCegarLoop]: 4167 mSDtfsCounter, 4082 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4339 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.92ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:48,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4082 Valid, 4339 Invalid, 10 Unknown, 0 Unchecked, 11.92ms Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 15.50ms Time] [2021-11-13 18:48:48,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-11-13 18:48:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 6079. [2021-11-13 18:48:48,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6079 states, 5484 states have (on average 1.5315463165572574) internal successors, (8399), 5512 states have internal predecessors, (8399), 345 states have call successors, (345), 233 states have call predecessors, (345), 248 states have return successors, (454), 337 states have call predecessors, (454), 343 states have call successors, (454) [2021-11-13 18:48:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6079 states to 6079 states and 9198 transitions. [2021-11-13 18:48:48,854 INFO L78 Accepts]: Start accepts. Automaton has 6079 states and 9198 transitions. Word has length 160 [2021-11-13 18:48:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:48,855 INFO L470 AbstractCegarLoop]: Abstraction has 6079 states and 9198 transitions. [2021-11-13 18:48:48,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6079 states and 9198 transitions. [2021-11-13 18:48:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:48,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:48,874 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, 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] [2021-11-13 18:48:48,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:49,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:49,091 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -881966169, now seen corresponding path program 1 times [2021-11-13 18:48:49,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:49,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810936523] [2021-11-13 18:48:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:49,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:48:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:48:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:48:49,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:49,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810936523] [2021-11-13 18:48:49,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810936523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:49,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984390362] [2021-11-13 18:48:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:49,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:49,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:49,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:49,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:48:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:48:49,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984390362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:49,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:49,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:49,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056191338] [2021-11-13 18:48:49,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:49,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:49,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:49,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:49,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:49,702 INFO L87 Difference]: Start difference. First operand 6079 states and 9198 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:48:50,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:50,299 INFO L93 Difference]: Finished difference Result 13785 states and 19596 transitions. [2021-11-13 18:48:50,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:50,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-11-13 18:48:50,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:50,360 INFO L225 Difference]: With dead ends: 13785 [2021-11-13 18:48:50,361 INFO L226 Difference]: Without dead ends: 9845 [2021-11-13 18:48:50,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:50,385 INFO L933 BasicCegarLoop]: 4309 mSDtfsCounter, 157 mSDsluCounter, 4141 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 8450 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.12ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:50,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 8450 Invalid, 13 Unknown, 0 Unchecked, 15.12ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 11.66ms Time] [2021-11-13 18:48:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9845 states. [2021-11-13 18:48:51,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9845 to 9833. [2021-11-13 18:48:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9833 states, 8672 states have (on average 1.4452260147601477) internal successors, (12533), 8726 states have internal predecessors, (12533), 671 states have call successors, (671), 457 states have call predecessors, (671), 488 states have return successors, (1078), 657 states have call predecessors, (1078), 669 states have call successors, (1078) [2021-11-13 18:48:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 14282 transitions. [2021-11-13 18:48:51,110 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 14282 transitions. Word has length 161 [2021-11-13 18:48:51,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:51,112 INFO L470 AbstractCegarLoop]: Abstraction has 9833 states and 14282 transitions. [2021-11-13 18:48:51,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:48:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 14282 transitions. [2021-11-13 18:48:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:51,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:51,144 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, 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] [2021-11-13 18:48:51,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:51,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:48:51,365 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 894122487, now seen corresponding path program 1 times [2021-11-13 18:48:51,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:51,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417833623] [2021-11-13 18:48:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:51,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:51,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:48:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:48:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:51,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 18:48:51,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:51,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417833623] [2021-11-13 18:48:51,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417833623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:51,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951871583] [2021-11-13 18:48:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:51,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:51,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:51,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:48:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:51,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:48:52,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:52,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951871583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:52,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:52,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:52,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208942177] [2021-11-13 18:48:52,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:52,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:52,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:52,006 INFO L87 Difference]: Start difference. First operand 9833 states and 14282 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:48:52,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:52,436 INFO L93 Difference]: Finished difference Result 14141 states and 20383 transitions. [2021-11-13 18:48:52,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:52,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-11-13 18:48:52,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:52,472 INFO L225 Difference]: With dead ends: 14141 [2021-11-13 18:48:52,473 INFO L226 Difference]: Without dead ends: 8089 [2021-11-13 18:48:52,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:52,498 INFO L933 BasicCegarLoop]: 4142 mSDtfsCounter, 4076 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4076 SdHoareTripleChecker+Valid, 4175 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:52,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4076 Valid, 4175 Invalid, 12 Unknown, 0 Unchecked, 10.28ms Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 11.28ms Time] [2021-11-13 18:48:52,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8089 states. [2021-11-13 18:48:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8089 to 6161. [2021-11-13 18:48:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6161 states, 5568 states have (on average 1.5001795977011494) internal successors, (8353), 5582 states have internal predecessors, (8353), 351 states have call successors, (351), 241 states have call predecessors, (351), 240 states have return successors, (522), 341 states have call predecessors, (522), 349 states have call successors, (522) [2021-11-13 18:48:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6161 states to 6161 states and 9226 transitions. [2021-11-13 18:48:52,963 INFO L78 Accepts]: Start accepts. Automaton has 6161 states and 9226 transitions. Word has length 161 [2021-11-13 18:48:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:52,963 INFO L470 AbstractCegarLoop]: Abstraction has 6161 states and 9226 transitions. [2021-11-13 18:48:52,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:48:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 6161 states and 9226 transitions. [2021-11-13 18:48:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:52,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:52,980 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, 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] [2021-11-13 18:48:53,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:53,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:48:53,194 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:53,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1649592762, now seen corresponding path program 1 times [2021-11-13 18:48:53,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:53,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649317478] [2021-11-13 18:48:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:53,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:48:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:48:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:48:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:48:53,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:53,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649317478] [2021-11-13 18:48:53,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649317478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:53,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830516444] [2021-11-13 18:48:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:53,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:53,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:53,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:53,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:48:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:48:53,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:53,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830516444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:53,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:53,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:53,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541155703] [2021-11-13 18:48:53,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:53,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:53,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:53,737 INFO L87 Difference]: Start difference. First operand 6161 states and 9226 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:48:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:54,260 INFO L93 Difference]: Finished difference Result 13609 states and 19178 transitions. [2021-11-13 18:48:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:54,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-11-13 18:48:54,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:54,300 INFO L225 Difference]: With dead ends: 13609 [2021-11-13 18:48:54,301 INFO L226 Difference]: Without dead ends: 9597 [2021-11-13 18:48:54,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:54,317 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 144 mSDsluCounter, 4138 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 8438 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.73ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:54,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 8438 Invalid, 13 Unknown, 0 Unchecked, 10.73ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 11.19ms Time] [2021-11-13 18:48:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9597 states. [2021-11-13 18:48:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9597 to 9593. [2021-11-13 18:48:54,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9593 states, 8476 states have (on average 1.413048607833884) internal successors, (11977), 8502 states have internal predecessors, (11977), 667 states have call successors, (667), 449 states have call predecessors, (667), 448 states have return successors, (1220), 649 states have call predecessors, (1220), 665 states have call successors, (1220) [2021-11-13 18:48:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9593 states to 9593 states and 13864 transitions. [2021-11-13 18:48:54,846 INFO L78 Accepts]: Start accepts. Automaton has 9593 states and 13864 transitions. Word has length 161 [2021-11-13 18:48:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 9593 states and 13864 transitions. [2021-11-13 18:48:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:48:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9593 states and 13864 transitions. [2021-11-13 18:48:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:54,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:54,869 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, 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] [2021-11-13 18:48:54,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:55,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:48:55,083 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -960758744, now seen corresponding path program 1 times [2021-11-13 18:48:55,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:55,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369404420] [2021-11-13 18:48:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:55,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:48:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:48:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:48:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:48:55,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:55,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369404420] [2021-11-13 18:48:55,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369404420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:55,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840028449] [2021-11-13 18:48:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:55,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:55,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:55,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:48:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:48:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:48:55,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840028449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:55,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:55,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:55,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783733576] [2021-11-13 18:48:55,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:55,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:55,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:55,588 INFO L87 Difference]: Start difference. First operand 9593 states and 13864 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:56,090 INFO L93 Difference]: Finished difference Result 15443 states and 21610 transitions. [2021-11-13 18:48:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-11-13 18:48:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:56,131 INFO L225 Difference]: With dead ends: 15443 [2021-11-13 18:48:56,132 INFO L226 Difference]: Without dead ends: 9709 [2021-11-13 18:48:56,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:56,154 INFO L933 BasicCegarLoop]: 4183 mSDtfsCounter, 4102 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4102 SdHoareTripleChecker+Valid, 4348 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.49ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.20ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:56,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4102 Valid, 4348 Invalid, 11 Unknown, 0 Unchecked, 10.49ms Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 9.20ms Time] [2021-11-13 18:48:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9709 states. [2021-11-13 18:48:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9709 to 9593. [2021-11-13 18:48:56,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9593 states, 8476 states have (on average 1.40738555922605) internal successors, (11929), 8502 states have internal predecessors, (11929), 667 states have call successors, (667), 449 states have call predecessors, (667), 448 states have return successors, (1220), 649 states have call predecessors, (1220), 665 states have call successors, (1220) [2021-11-13 18:48:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9593 states to 9593 states and 13816 transitions. [2021-11-13 18:48:56,840 INFO L78 Accepts]: Start accepts. Automaton has 9593 states and 13816 transitions. Word has length 161 [2021-11-13 18:48:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:56,840 INFO L470 AbstractCegarLoop]: Abstraction has 9593 states and 13816 transitions. [2021-11-13 18:48:56,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9593 states and 13816 transitions. [2021-11-13 18:48:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:56,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:56,860 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, 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] [2021-11-13 18:48:56,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:57,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:48:57,075 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:57,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1591418517, now seen corresponding path program 1 times [2021-11-13 18:48:57,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:57,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472863964] [2021-11-13 18:48:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:57,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:48:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:48:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:48:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-13 18:48:57,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:57,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472863964] [2021-11-13 18:48:57,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472863964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:57,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155938080] [2021-11-13 18:48:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:57,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:57,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:57,204 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:57,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:48:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:57,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:48:57,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:57,658 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:48:57,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155938080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:57,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:57,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:48:57,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182288705] [2021-11-13 18:48:57,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:57,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:57,661 INFO L87 Difference]: Start difference. First operand 9593 states and 13816 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:58,108 INFO L93 Difference]: Finished difference Result 15531 states and 21660 transitions. [2021-11-13 18:48:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-11-13 18:48:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:58,151 INFO L225 Difference]: With dead ends: 15531 [2021-11-13 18:48:58,151 INFO L226 Difference]: Without dead ends: 9797 [2021-11-13 18:48:58,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:48:58,169 INFO L933 BasicCegarLoop]: 4196 mSDtfsCounter, 4101 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4101 SdHoareTripleChecker+Valid, 4363 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.15ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:58,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4101 Valid, 4363 Invalid, 11 Unknown, 0 Unchecked, 9.15ms Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 9.88ms Time] [2021-11-13 18:48:58,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9797 states. [2021-11-13 18:48:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9797 to 9577. [2021-11-13 18:48:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9577 states, 8460 states have (on average 1.4024822695035462) internal successors, (11865), 8486 states have internal predecessors, (11865), 667 states have call successors, (667), 449 states have call predecessors, (667), 448 states have return successors, (1220), 649 states have call predecessors, (1220), 665 states have call successors, (1220) [2021-11-13 18:48:58,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9577 states to 9577 states and 13752 transitions. [2021-11-13 18:48:58,733 INFO L78 Accepts]: Start accepts. Automaton has 9577 states and 13752 transitions. Word has length 161 [2021-11-13 18:48:58,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:58,734 INFO L470 AbstractCegarLoop]: Abstraction has 9577 states and 13752 transitions. [2021-11-13 18:48:58,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:48:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 9577 states and 13752 transitions. [2021-11-13 18:48:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:48:58,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:58,756 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, 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] [2021-11-13 18:48:58,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:58,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:48:58,983 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash -241629912, now seen corresponding path program 1 times [2021-11-13 18:48:58,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:58,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144171522] [2021-11-13 18:48:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:58,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:48:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:48:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:48:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:48:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:48:59,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:48:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:48:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:48:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:48:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-13 18:48:59,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:59,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144171522] [2021-11-13 18:48:59,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144171522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:59,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:59,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:48:59,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038814445] [2021-11-13 18:48:59,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:59,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:48:59,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:48:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:48:59,069 INFO L87 Difference]: Start difference. First operand 9577 states and 13752 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:48:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:59,962 INFO L93 Difference]: Finished difference Result 16661 states and 22927 transitions. [2021-11-13 18:48:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:48:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-11-13 18:48:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:59,998 INFO L225 Difference]: With dead ends: 16661 [2021-11-13 18:48:59,999 INFO L226 Difference]: Without dead ends: 9229 [2021-11-13 18:49:00,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:00,015 INFO L933 BasicCegarLoop]: 4145 mSDtfsCounter, 273 mSDsluCounter, 12024 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 16169 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.67ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 189.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:00,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 16169 Invalid, 185 Unknown, 0 Unchecked, 27.67ms Time], IncrementalHoareTripleChecker [41 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 189.79ms Time] [2021-11-13 18:49:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9229 states. [2021-11-13 18:49:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9229 to 8803. [2021-11-13 18:49:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8803 states, 7842 states have (on average 1.417878092323387) internal successors, (11119), 7936 states have internal predecessors, (11119), 503 states have call successors, (503), 345 states have call predecessors, (503), 456 states have return successors, (1013), 525 states have call predecessors, (1013), 501 states have call successors, (1013) [2021-11-13 18:49:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8803 states to 8803 states and 12635 transitions. [2021-11-13 18:49:00,556 INFO L78 Accepts]: Start accepts. Automaton has 8803 states and 12635 transitions. Word has length 161 [2021-11-13 18:49:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:00,557 INFO L470 AbstractCegarLoop]: Abstraction has 8803 states and 12635 transitions. [2021-11-13 18:49:00,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:49:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 8803 states and 12635 transitions. [2021-11-13 18:49:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:49:00,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:00,577 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, 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] [2021-11-13 18:49:00,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:49:00,578 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1811383149, now seen corresponding path program 1 times [2021-11-13 18:49:00,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:00,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363182118] [2021-11-13 18:49:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:00,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:00,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:49:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-13 18:49:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-11-13 18:49:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 18:49:00,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:00,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363182118] [2021-11-13 18:49:00,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363182118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:00,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:00,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:49:00,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555468073] [2021-11-13 18:49:00,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:00,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:00,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:00,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:00,669 INFO L87 Difference]: Start difference. First operand 8803 states and 12635 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:49:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:01,354 INFO L93 Difference]: Finished difference Result 14333 states and 19782 transitions. [2021-11-13 18:49:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-11-13 18:49:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:01,384 INFO L225 Difference]: With dead ends: 14333 [2021-11-13 18:49:01,384 INFO L226 Difference]: Without dead ends: 7667 [2021-11-13 18:49:01,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:01,401 INFO L933 BasicCegarLoop]: 4144 mSDtfsCounter, 273 mSDsluCounter, 12023 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 16167 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.52ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 194.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:01,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 16167 Invalid, 184 Unknown, 0 Unchecked, 27.52ms Time], IncrementalHoareTripleChecker [41 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 194.07ms Time] [2021-11-13 18:49:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-11-13 18:49:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 7251. [2021-11-13 18:49:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 6524 states have (on average 1.457847946045371) internal successors, (9511), 6591 states have internal predecessors, (9511), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (717), 396 states have call predecessors, (717), 379 states have call successors, (717) [2021-11-13 18:49:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 10609 transitions. [2021-11-13 18:49:01,842 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 10609 transitions. Word has length 161 [2021-11-13 18:49:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:01,842 INFO L470 AbstractCegarLoop]: Abstraction has 7251 states and 10609 transitions. [2021-11-13 18:49:01,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-13 18:49:01,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 10609 transitions. [2021-11-13 18:49:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:49:01,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:01,855 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, 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] [2021-11-13 18:49:01,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:49:01,855 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:01,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1070600958, now seen corresponding path program 1 times [2021-11-13 18:49:01,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:01,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622503205] [2021-11-13 18:49:01,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:01,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:49:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:01,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:01,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622503205] [2021-11-13 18:49:01,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622503205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:01,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343904613] [2021-11-13 18:49:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:01,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:01,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:01,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:01,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:49:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:02,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:49:02,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:49:02,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:02,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343904613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:02,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:02,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:49:02,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023728558] [2021-11-13 18:49:02,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:02,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:02,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:02,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:02,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:02,421 INFO L87 Difference]: Start difference. First operand 7251 states and 10609 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:49:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:02,874 INFO L93 Difference]: Finished difference Result 10889 states and 15753 transitions. [2021-11-13 18:49:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-11-13 18:49:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:02,904 INFO L225 Difference]: With dead ends: 10889 [2021-11-13 18:49:02,904 INFO L226 Difference]: Without dead ends: 7279 [2021-11-13 18:49:02,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:02,917 INFO L933 BasicCegarLoop]: 4264 mSDtfsCounter, 136 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 8385 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.31ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:02,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 8385 Invalid, 10 Unknown, 0 Unchecked, 10.31ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 9.51ms Time] [2021-11-13 18:49:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2021-11-13 18:49:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7251. [2021-11-13 18:49:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 6524 states have (on average 1.4422133660331085) internal successors, (9409), 6591 states have internal predecessors, (9409), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (717), 396 states have call predecessors, (717), 379 states have call successors, (717) [2021-11-13 18:49:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 10507 transitions. [2021-11-13 18:49:03,464 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 10507 transitions. Word has length 163 [2021-11-13 18:49:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:03,465 INFO L470 AbstractCegarLoop]: Abstraction has 7251 states and 10507 transitions. [2021-11-13 18:49:03,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:49:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 10507 transitions. [2021-11-13 18:49:03,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:49:03,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:03,477 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, 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] [2021-11-13 18:49:03,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:03,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:03,703 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1892472034, now seen corresponding path program 1 times [2021-11-13 18:49:03,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:03,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266718935] [2021-11-13 18:49:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:03,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:49:03,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:03,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:03,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266718935] [2021-11-13 18:49:03,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266718935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:03,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290859920] [2021-11-13 18:49:03,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:03,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:03,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:03,859 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:03,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:49:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:03,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:03,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:49:04,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:04,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290859920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:04,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:04,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:49:04,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133102390] [2021-11-13 18:49:04,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:04,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:04,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:04,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:04,313 INFO L87 Difference]: Start difference. First operand 7251 states and 10507 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:04,733 INFO L93 Difference]: Finished difference Result 12639 states and 17680 transitions. [2021-11-13 18:49:04,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:04,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-11-13 18:49:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:04,763 INFO L225 Difference]: With dead ends: 12639 [2021-11-13 18:49:04,763 INFO L226 Difference]: Without dead ends: 7527 [2021-11-13 18:49:04,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:04,778 INFO L933 BasicCegarLoop]: 4142 mSDtfsCounter, 4117 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4117 SdHoareTripleChecker+Valid, 4174 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.75ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:04,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4117 Valid, 4174 Invalid, 10 Unknown, 0 Unchecked, 7.75ms Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 13.57ms Time] [2021-11-13 18:49:04,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2021-11-13 18:49:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 7333. [2021-11-13 18:49:05,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7333 states, 6606 states have (on average 1.419164396003633) internal successors, (9375), 6673 states have internal predecessors, (9375), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (685), 396 states have call predecessors, (685), 379 states have call successors, (685) [2021-11-13 18:49:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 10441 transitions. [2021-11-13 18:49:05,136 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 10441 transitions. Word has length 163 [2021-11-13 18:49:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 7333 states and 10441 transitions. [2021-11-13 18:49:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 10441 transitions. [2021-11-13 18:49:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:49:05,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:05,147 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, 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] [2021-11-13 18:49:05,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:05,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-13 18:49:05,363 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:05,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:05,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2095744383, now seen corresponding path program 1 times [2021-11-13 18:49:05,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:05,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671874401] [2021-11-13 18:49:05,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:05,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-13 18:49:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:49:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 18:49:05,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:05,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671874401] [2021-11-13 18:49:05,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671874401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:05,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111385169] [2021-11-13 18:49:05,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:05,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:05,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:05,487 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:05,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:49:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:49:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:49:05,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:05,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111385169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:05,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:05,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:49:05,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486123932] [2021-11-13 18:49:05,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:05,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:05,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:05,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:05,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:05,924 INFO L87 Difference]: Start difference. First operand 7333 states and 10441 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:49:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:06,233 INFO L93 Difference]: Finished difference Result 11041 states and 15441 transitions. [2021-11-13 18:49:06,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:06,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-11-13 18:49:06,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:06,259 INFO L225 Difference]: With dead ends: 11041 [2021-11-13 18:49:06,260 INFO L226 Difference]: Without dead ends: 7361 [2021-11-13 18:49:06,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:06,272 INFO L933 BasicCegarLoop]: 4285 mSDtfsCounter, 130 mSDsluCounter, 4121 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 8406 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.61ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:06,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 8406 Invalid, 10 Unknown, 0 Unchecked, 6.61ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 12.03ms Time] [2021-11-13 18:49:06,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2021-11-13 18:49:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 7333. [2021-11-13 18:49:06,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7333 states, 6606 states have (on average 1.4009990917347865) internal successors, (9255), 6673 states have internal predecessors, (9255), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (685), 396 states have call predecessors, (685), 379 states have call successors, (685) [2021-11-13 18:49:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 10321 transitions. [2021-11-13 18:49:06,813 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 10321 transitions. Word has length 163 [2021-11-13 18:49:06,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 7333 states and 10321 transitions. [2021-11-13 18:49:06,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 18:49:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 10321 transitions. [2021-11-13 18:49:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 18:49:06,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:06,823 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, 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] [2021-11-13 18:49:06,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:07,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:07,043 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:07,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:07,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1992130805, now seen corresponding path program 1 times [2021-11-13 18:49:07,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:07,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794135508] [2021-11-13 18:49:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:07,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:07,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:49:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,164 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:07,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794135508] [2021-11-13 18:49:07,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794135508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:07,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076059940] [2021-11-13 18:49:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:07,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:07,167 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:07,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:49:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:49:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:49:07,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:07,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076059940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:07,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:07,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:49:07,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388238534] [2021-11-13 18:49:07,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:07,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:07,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:07,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:07,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:07,605 INFO L87 Difference]: Start difference. First operand 7333 states and 10321 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:07,958 INFO L93 Difference]: Finished difference Result 10001 states and 13843 transitions. [2021-11-13 18:49:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:07,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 164 [2021-11-13 18:49:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:07,984 INFO L225 Difference]: With dead ends: 10001 [2021-11-13 18:49:07,984 INFO L226 Difference]: Without dead ends: 7342 [2021-11-13 18:49:07,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:07,995 INFO L933 BasicCegarLoop]: 4266 mSDtfsCounter, 151 mSDsluCounter, 4113 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 8379 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.14ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:07,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 8379 Invalid, 7 Unknown, 0 Unchecked, 13.14ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 7.24ms Time] [2021-11-13 18:49:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7342 states. [2021-11-13 18:49:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7342 to 7333. [2021-11-13 18:49:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7333 states, 6606 states have (on average 1.393732970027248) internal successors, (9207), 6673 states have internal predecessors, (9207), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (685), 396 states have call predecessors, (685), 379 states have call successors, (685) [2021-11-13 18:49:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 10273 transitions. [2021-11-13 18:49:08,437 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 10273 transitions. Word has length 164 [2021-11-13 18:49:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:08,438 INFO L470 AbstractCegarLoop]: Abstraction has 7333 states and 10273 transitions. [2021-11-13 18:49:08,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 10273 transitions. [2021-11-13 18:49:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:49:08,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:08,447 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, 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] [2021-11-13 18:49:08,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:08,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:08,663 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:08,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1584785558, now seen corresponding path program 1 times [2021-11-13 18:49:08,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:08,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798269503] [2021-11-13 18:49:08,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:08,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:08,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:49:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:08,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798269503] [2021-11-13 18:49:08,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798269503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:08,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783869442] [2021-11-13 18:49:08,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:08,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:08,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:08,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:08,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:49:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:49:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 18:49:09,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:09,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783869442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:09,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:09,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-13 18:49:09,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766654766] [2021-11-13 18:49:09,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:09,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:09,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:09,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:09,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:49:09,298 INFO L87 Difference]: Start difference. First operand 7333 states and 10273 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:09,951 INFO L93 Difference]: Finished difference Result 12527 states and 16598 transitions. [2021-11-13 18:49:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-11-13 18:49:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:09,973 INFO L225 Difference]: With dead ends: 12527 [2021-11-13 18:49:09,973 INFO L226 Difference]: Without dead ends: 7333 [2021-11-13 18:49:09,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:49:09,985 INFO L933 BasicCegarLoop]: 4117 mSDtfsCounter, 4138 mSDsluCounter, 8098 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 82.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4147 SdHoareTripleChecker+Valid, 12215 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.82ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 102.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:09,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4147 Valid, 12215 Invalid, 140 Unknown, 0 Unchecked, 21.82ms Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 102.18ms Time] [2021-11-13 18:49:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7333 states. [2021-11-13 18:49:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7333 to 7333. [2021-11-13 18:49:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7333 states, 6606 states have (on average 1.38283378746594) internal successors, (9135), 6673 states have internal predecessors, (9135), 381 states have call successors, (381), 265 states have call predecessors, (381), 344 states have return successors, (685), 396 states have call predecessors, (685), 379 states have call successors, (685) [2021-11-13 18:49:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7333 states to 7333 states and 10201 transitions. [2021-11-13 18:49:10,379 INFO L78 Accepts]: Start accepts. Automaton has 7333 states and 10201 transitions. Word has length 165 [2021-11-13 18:49:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:10,379 INFO L470 AbstractCegarLoop]: Abstraction has 7333 states and 10201 transitions. [2021-11-13 18:49:10,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:10,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7333 states and 10201 transitions. [2021-11-13 18:49:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:49:10,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:10,385 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, 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] [2021-11-13 18:49:10,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:10,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:49:10,599 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:10,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2072832664, now seen corresponding path program 1 times [2021-11-13 18:49:10,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:10,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188341495] [2021-11-13 18:49:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:10,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:49:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,711 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:10,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188341495] [2021-11-13 18:49:10,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188341495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:10,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720074499] [2021-11-13 18:49:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:10,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:10,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:10,715 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:10,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:49:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:49:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-13 18:49:11,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:11,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720074499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:11,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:11,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-13 18:49:11,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896689685] [2021-11-13 18:49:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:11,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:11,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:49:11,220 INFO L87 Difference]: Start difference. First operand 7333 states and 10201 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:12,141 INFO L93 Difference]: Finished difference Result 17829 states and 22617 transitions. [2021-11-13 18:49:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-11-13 18:49:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:12,178 INFO L225 Difference]: With dead ends: 17829 [2021-11-13 18:49:12,178 INFO L226 Difference]: Without dead ends: 12635 [2021-11-13 18:49:12,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:49:12,194 INFO L933 BasicCegarLoop]: 4140 mSDtfsCounter, 4181 mSDsluCounter, 8218 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4190 SdHoareTripleChecker+Valid, 12358 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.49ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:12,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4190 Valid, 12358 Invalid, 227 Unknown, 0 Unchecked, 16.49ms Time], IncrementalHoareTripleChecker [40 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 201.32ms Time] [2021-11-13 18:49:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12635 states. [2021-11-13 18:49:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12635 to 12631. [2021-11-13 18:49:12,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 11188 states have (on average 1.281283518055059) internal successors, (14335), 11354 states have internal predecessors, (14335), 717 states have call successors, (717), 529 states have call predecessors, (717), 724 states have return successors, (1273), 749 states have call predecessors, (1273), 715 states have call successors, (1273) [2021-11-13 18:49:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 16325 transitions. [2021-11-13 18:49:12,917 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 16325 transitions. Word has length 165 [2021-11-13 18:49:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:12,918 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 16325 transitions. [2021-11-13 18:49:12,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 16325 transitions. [2021-11-13 18:49:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:49:12,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:12,925 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, 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] [2021-11-13 18:49:12,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:13,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:49:13,125 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 22423766, now seen corresponding path program 1 times [2021-11-13 18:49:13,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:13,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40252819] [2021-11-13 18:49:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:13,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:13,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 18:49:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:49:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,246 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:49:13,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:13,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40252819] [2021-11-13 18:49:13,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40252819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:13,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407671665] [2021-11-13 18:49:13,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:13,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:13,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:13,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:49:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:13,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:49:13,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:13,635 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-13 18:49:13,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:13,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407671665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:13,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:13,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-13 18:49:13,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138321091] [2021-11-13 18:49:13,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:13,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:13,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:13,638 INFO L87 Difference]: Start difference. First operand 12631 states and 16325 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:14,614 INFO L93 Difference]: Finished difference Result 19904 states and 25123 transitions. [2021-11-13 18:49:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:14,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-11-13 18:49:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:14,639 INFO L225 Difference]: With dead ends: 19904 [2021-11-13 18:49:14,639 INFO L226 Difference]: Without dead ends: 9405 [2021-11-13 18:49:14,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:14,664 INFO L933 BasicCegarLoop]: 4133 mSDtfsCounter, 87 mSDsluCounter, 12423 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 16556 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:14,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 16556 Invalid, 14 Unknown, 0 Unchecked, 17.03ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 8.76ms Time] [2021-11-13 18:49:14,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9405 states. [2021-11-13 18:49:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9405 to 9009. [2021-11-13 18:49:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9009 states, 8019 states have (on average 1.3204888390073575) internal successors, (10589), 8126 states have internal predecessors, (10589), 494 states have call successors, (494), 369 states have call predecessors, (494), 494 states have return successors, (786), 514 states have call predecessors, (786), 492 states have call successors, (786) [2021-11-13 18:49:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9009 states to 9009 states and 11869 transitions. [2021-11-13 18:49:15,342 INFO L78 Accepts]: Start accepts. Automaton has 9009 states and 11869 transitions. Word has length 165 [2021-11-13 18:49:15,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:15,343 INFO L470 AbstractCegarLoop]: Abstraction has 9009 states and 11869 transitions. [2021-11-13 18:49:15,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:15,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9009 states and 11869 transitions. [2021-11-13 18:49:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:49:15,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:15,347 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, 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] [2021-11-13 18:49:15,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:15,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 18:49:15,551 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1805871025, now seen corresponding path program 1 times [2021-11-13 18:49:15,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:15,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919834917] [2021-11-13 18:49:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:15,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:49:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:49:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:49:15,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:15,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919834917] [2021-11-13 18:49:15,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919834917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:15,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814885146] [2021-11-13 18:49:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:15,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:15,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:15,677 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:49:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:15,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:49:15,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-13 18:49:16,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:16,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814885146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:16,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:16,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-13 18:49:16,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333215903] [2021-11-13 18:49:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:16,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:16,105 INFO L87 Difference]: Start difference. First operand 9009 states and 11869 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:16,530 INFO L93 Difference]: Finished difference Result 14833 states and 18751 transitions. [2021-11-13 18:49:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-11-13 18:49:16,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:16,552 INFO L225 Difference]: With dead ends: 14833 [2021-11-13 18:49:16,553 INFO L226 Difference]: Without dead ends: 7956 [2021-11-13 18:49:16,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:16,567 INFO L933 BasicCegarLoop]: 4132 mSDtfsCounter, 49 mSDsluCounter, 12410 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16542 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.54ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:16,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 16542 Invalid, 14 Unknown, 0 Unchecked, 11.54ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 10.18ms Time] [2021-11-13 18:49:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7956 states. [2021-11-13 18:49:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7956 to 7808. [2021-11-13 18:49:17,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7808 states, 6974 states have (on average 1.3366790937768855) internal successors, (9322), 7056 states have internal predecessors, (9322), 421 states have call successors, (421), 311 states have call predecessors, (421), 411 states have return successors, (610), 441 states have call predecessors, (610), 419 states have call successors, (610) [2021-11-13 18:49:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7808 states to 7808 states and 10353 transitions. [2021-11-13 18:49:17,023 INFO L78 Accepts]: Start accepts. Automaton has 7808 states and 10353 transitions. Word has length 165 [2021-11-13 18:49:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:17,023 INFO L470 AbstractCegarLoop]: Abstraction has 7808 states and 10353 transitions. [2021-11-13 18:49:17,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 7808 states and 10353 transitions. [2021-11-13 18:49:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 18:49:17,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:17,026 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, 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] [2021-11-13 18:49:17,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:17,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:17,227 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:17,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1637482603, now seen corresponding path program 1 times [2021-11-13 18:49:17,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:17,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915634921] [2021-11-13 18:49:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:17,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:49:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:49:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:49:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-13 18:49:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 18:49:17,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:17,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915634921] [2021-11-13 18:49:17,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915634921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:17,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649444582] [2021-11-13 18:49:17,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:17,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:17,363 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:17,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:49:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:49:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 18:49:17,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:17,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649444582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:17,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:17,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-13 18:49:17,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891446490] [2021-11-13 18:49:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:17,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:17,814 INFO L87 Difference]: Start difference. First operand 7808 states and 10353 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:18,037 INFO L93 Difference]: Finished difference Result 10575 states and 13493 transitions. [2021-11-13 18:49:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:18,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-11-13 18:49:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:18,045 INFO L225 Difference]: With dead ends: 10575 [2021-11-13 18:49:18,045 INFO L226 Difference]: Without dead ends: 3845 [2021-11-13 18:49:18,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:18,052 INFO L933 BasicCegarLoop]: 4132 mSDtfsCounter, 10 mSDsluCounter, 12395 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16527 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:18,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16527 Invalid, 14 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 9.61ms Time] [2021-11-13 18:49:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3845 states. [2021-11-13 18:49:18,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3845 to 3845. [2021-11-13 18:49:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3845 states, 3589 states have (on average 1.5416550571189747) internal successors, (5533), 3602 states have internal predecessors, (5533), 146 states have call successors, (146), 101 states have call predecessors, (146), 108 states have return successors, (152), 142 states have call predecessors, (152), 144 states have call successors, (152) [2021-11-13 18:49:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3845 states to 3845 states and 5831 transitions. [2021-11-13 18:49:18,188 INFO L78 Accepts]: Start accepts. Automaton has 3845 states and 5831 transitions. Word has length 165 [2021-11-13 18:49:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:18,188 INFO L470 AbstractCegarLoop]: Abstraction has 3845 states and 5831 transitions. [2021-11-13 18:49:18,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:49:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3845 states and 5831 transitions. [2021-11-13 18:49:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 18:49:18,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:18,191 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, 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] [2021-11-13 18:49:18,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:18,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 18:49:18,392 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1365063130, now seen corresponding path program 1 times [2021-11-13 18:49:18,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:18,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623701036] [2021-11-13 18:49:18,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:18,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:49:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:49:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:49:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:18,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-13 18:49:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:49:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-13 18:49:18,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:18,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623701036] [2021-11-13 18:49:18,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623701036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:18,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:18,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:49:18,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524717819] [2021-11-13 18:49:18,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:18,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:18,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:18,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:18,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:18,578 INFO L87 Difference]: Start difference. First operand 3845 states and 5831 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:49:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:19,671 INFO L93 Difference]: Finished difference Result 3847 states and 5832 transitions. [2021-11-13 18:49:19,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:49:19,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 203 [2021-11-13 18:49:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:19,682 INFO L225 Difference]: With dead ends: 3847 [2021-11-13 18:49:19,683 INFO L226 Difference]: Without dead ends: 3844 [2021-11-13 18:49:19,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:49:19,685 INFO L933 BasicCegarLoop]: 4280 mSDtfsCounter, 4583 mSDsluCounter, 16397 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 519.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4613 SdHoareTripleChecker+Valid, 20677 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.02ms SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 629.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:19,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4613 Valid, 20677 Invalid, 792 Unknown, 0 Unchecked, 38.02ms Time], IncrementalHoareTripleChecker [77 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 629.03ms Time] [2021-11-13 18:49:19,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-11-13 18:49:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3844. [2021-11-13 18:49:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3844 states, 3589 states have (on average 1.5410977988297576) internal successors, (5531), 3601 states have internal predecessors, (5531), 145 states have call successors, (145), 101 states have call predecessors, (145), 108 states have return successors, (152), 142 states have call predecessors, (152), 144 states have call successors, (152) [2021-11-13 18:49:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5828 transitions. [2021-11-13 18:49:19,923 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5828 transitions. Word has length 203 [2021-11-13 18:49:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:19,924 INFO L470 AbstractCegarLoop]: Abstraction has 3844 states and 5828 transitions. [2021-11-13 18:49:19,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:49:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5828 transitions. [2021-11-13 18:49:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:49:19,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:19,931 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, 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] [2021-11-13 18:49:19,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-13 18:49:19,931 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -575528242, now seen corresponding path program 1 times [2021-11-13 18:49:19,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:19,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205482542] [2021-11-13 18:49:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:19,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:49:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-13 18:49:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:49:20,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:49:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:49:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-13 18:49:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:49:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:49:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-11-13 18:49:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:49:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 18:49:20,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:20,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205482542] [2021-11-13 18:49:20,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205482542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:20,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:20,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:49:20,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40815862] [2021-11-13 18:49:20,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:20,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:20,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:20,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:20,097 INFO L87 Difference]: Start difference. First operand 3844 states and 5828 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:49:20,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:20,572 INFO L93 Difference]: Finished difference Result 4810 states and 6931 transitions. [2021-11-13 18:49:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) Word has length 207 [2021-11-13 18:49:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:20,582 INFO L225 Difference]: With dead ends: 4810 [2021-11-13 18:49:20,582 INFO L226 Difference]: Without dead ends: 4092 [2021-11-13 18:49:20,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:49:20,585 INFO L933 BasicCegarLoop]: 4187 mSDtfsCounter, 186 mSDsluCounter, 12221 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 16408 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.20ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 249.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:20,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 16408 Invalid, 260 Unknown, 0 Unchecked, 22.20ms Time], IncrementalHoareTripleChecker [30 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 249.08ms Time] [2021-11-13 18:49:20,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4092 states. [2021-11-13 18:49:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4092 to 3846. [2021-11-13 18:49:20,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3591 states have (on average 1.5407964355332777) internal successors, (5533), 3603 states have internal predecessors, (5533), 145 states have call successors, (145), 101 states have call predecessors, (145), 108 states have return successors, (152), 142 states have call predecessors, (152), 144 states have call successors, (152) [2021-11-13 18:49:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 5830 transitions. [2021-11-13 18:49:20,800 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 5830 transitions. Word has length 207 [2021-11-13 18:49:20,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:20,801 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 5830 transitions. [2021-11-13 18:49:20,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 18:49:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 5830 transitions. [2021-11-13 18:49:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:49:20,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:20,804 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, 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] [2021-11-13 18:49:20,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-13 18:49:20,805 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash 567683991, now seen corresponding path program 1 times [2021-11-13 18:49:20,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:20,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865035212] [2021-11-13 18:49:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:20,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:49:20,832 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:49:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:49:20,973 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:49:20,974 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:49:20,975 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 18:49:20,977 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 18:49:20,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:49:20,981 INFO L732 BasicCegarLoop]: Path program 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] [2021-11-13 18:49:20,985 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:49:21,067 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:49:21,070 INFO L158 Benchmark]: Toolchain (without parser) took 59619.00ms. Allocated memory was 98.6MB in the beginning and 2.9GB in the end (delta: 2.8GB). Free memory was 49.2MB in the beginning and 2.2GB in the end (delta: -2.2GB). Peak memory consumption was 646.1MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,071 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:49:21,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4227.70ms. Allocated memory was 98.6MB in the beginning and 169.9MB in the end (delta: 71.3MB). Free memory was 48.9MB in the beginning and 67.0MB in the end (delta: -18.1MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,071 INFO L158 Benchmark]: Boogie Procedure Inliner took 717.09ms. Allocated memory was 169.9MB in the beginning and 274.7MB in the end (delta: 104.9MB). Free memory was 67.0MB in the beginning and 146.1MB in the end (delta: -79.1MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,076 INFO L158 Benchmark]: Boogie Preprocessor took 665.98ms. Allocated memory is still 274.7MB. Free memory was 146.1MB in the beginning and 135.8MB in the end (delta: 10.3MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,076 INFO L158 Benchmark]: RCFGBuilder took 8211.85ms. Allocated memory was 274.7MB in the beginning and 1.1GB in the end (delta: 817.9MB). Free memory was 135.8MB in the beginning and 859.0MB in the end (delta: -723.2MB). Peak memory consumption was 306.3MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,077 INFO L158 Benchmark]: TraceAbstraction took 45789.70ms. Allocated memory was 1.1GB in the beginning and 2.9GB in the end (delta: 1.8GB). Free memory was 857.9MB in the beginning and 2.2GB in the end (delta: -1.3GB). Peak memory consumption was 462.3MB. Max. memory is 16.1GB. [2021-11-13 18:49:21,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 98.6MB. Free memory is still 77.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4227.70ms. Allocated memory was 98.6MB in the beginning and 169.9MB in the end (delta: 71.3MB). Free memory was 48.9MB in the beginning and 67.0MB in the end (delta: -18.1MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 717.09ms. Allocated memory was 169.9MB in the beginning and 274.7MB in the end (delta: 104.9MB). Free memory was 67.0MB in the beginning and 146.1MB in the end (delta: -79.1MB). Peak memory consumption was 35.9MB. Max. memory is 16.1GB. * Boogie Preprocessor took 665.98ms. Allocated memory is still 274.7MB. Free memory was 146.1MB in the beginning and 135.8MB in the end (delta: 10.3MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * RCFGBuilder took 8211.85ms. Allocated memory was 274.7MB in the beginning and 1.1GB in the end (delta: 817.9MB). Free memory was 135.8MB in the beginning and 859.0MB in the end (delta: -723.2MB). Peak memory consumption was 306.3MB. Max. memory is 16.1GB. * TraceAbstraction took 45789.70ms. Allocated memory was 1.1GB in the beginning and 2.9GB in the end (delta: 1.8GB). Free memory was 857.9MB in the beginning and 2.2GB in the end (delta: -1.3GB). Peak memory consumption was 462.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:49:21,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y --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 c7c4bef8c60b810569a22d8a73144498437260dfbc0e4b7320d169bed033790e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:49:23,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:49:23,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:49:23,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:49:23,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:49:23,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:49:23,836 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:49:23,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:49:23,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:49:23,852 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:49:23,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:49:23,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:49:23,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:49:23,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:49:23,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:49:23,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:49:23,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:49:23,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:49:23,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:49:23,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:49:23,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:49:23,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:49:23,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:49:23,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:49:23,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:49:23,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:49:23,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:49:23,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:49:23,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:49:23,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:49:23,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:49:23,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:49:23,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:49:23,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:49:23,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:49:23,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:49:23,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:49:23,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:49:23,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:49:23,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:49:23,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:49:23,911 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-13 18:49:23,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:49:23,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:49:23,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:49:23,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:49:23,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:49:23,940 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:49:23,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:49:23,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:49:23,941 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:49:23,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:49:23,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:49:23,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:49:23,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:49:23,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:49:23,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:49:23,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:49:23,944 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:49:23,944 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:49:23,944 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:49:23,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:49:23,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:49:23,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:49:23,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:49:23,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:49:23,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:49:23,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:23,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:49:23,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:49:23,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:49:23,947 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:49:23,947 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:49:23,947 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:49:23,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:49:23,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:49:23,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:49:23,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:49:23,949 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7c4bef8c60b810569a22d8a73144498437260dfbc0e4b7320d169bed033790e [2021-11-13 18:49:24,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:49:24,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:49:24,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:49:24,425 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:49:24,426 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:49:24,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:49:24,507 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/64bf54301/981d079ba7a34b64be0f037b41d603b7/FLAG45a7baa09 [2021-11-13 18:49:25,707 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:49:25,708 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:49:25,767 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/64bf54301/981d079ba7a34b64be0f037b41d603b7/FLAG45a7baa09 [2021-11-13 18:49:25,943 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/data/64bf54301/981d079ba7a34b64be0f037b41d603b7 [2021-11-13 18:49:25,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:49:25,948 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:49:25,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:25,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:49:25,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:49:25,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:25" (1/1) ... [2021-11-13 18:49:25,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f356ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:25, skipping insertion in model container [2021-11-13 18:49:25,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:49:25" (1/1) ... [2021-11-13 18:49:25,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:49:26,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:49:28,713 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[381679,381692] [2021-11-13 18:49:28,745 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[383339,383352] [2021-11-13 18:49:28,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:28,969 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:49:30,321 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[381679,381692] [2021-11-13 18:49:30,326 WARN L228 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_56e45466-a397-4430-9c3a-ea5ef6511035/sv-benchmarks/c/combinations/Problem05_label43+token_ring.02.cil-2.c[383339,383352] [2021-11-13 18:49:30,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:49:30,429 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:49:30,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30 WrapperNode [2021-11-13 18:49:30,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:49:30,431 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:30,431 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:49:30,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:49:30,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:30,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,032 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:49:31,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:49:31,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:49:31,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:49:31,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:49:31,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:49:31,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:49:31,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:49:31,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (1/1) ... [2021-11-13 18:49:31,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:49:31,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:31,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:49:31,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:49:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:49:31,983 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 18:49:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 18:49:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:49:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:49:31,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:49:31,984 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:49:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:49:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:49:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:49:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:49:31,985 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:49:31,985 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:49:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:49:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:49:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:49:31,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:49:31,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:49:42,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:49:42,672 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:49:42,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:42 BoogieIcfgContainer [2021-11-13 18:49:42,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:49:42,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:49:42,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:49:42,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:49:42,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:49:25" (1/3) ... [2021-11-13 18:49:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1653b7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:42, skipping insertion in model container [2021-11-13 18:49:42,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:49:30" (2/3) ... [2021-11-13 18:49:42,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1653b7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:49:42, skipping insertion in model container [2021-11-13 18:49:42,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:49:42" (3/3) ... [2021-11-13 18:49:42,688 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.02.cil-2.c [2021-11-13 18:49:42,693 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:49:42,694 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:49:42,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:49:42,765 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 [2021-11-13 18:49:42,765 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:49:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-13 18:49:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:42,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:42,850 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] [2021-11-13 18:49:42,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-11-13 18:49:42,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:42,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086229302] [2021-11-13 18:49:42,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:42,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:42,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:42,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:42,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:49:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:43,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:43,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:43,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086229302] [2021-11-13 18:49:43,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086229302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:43,589 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:43,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:43,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769739421] [2021-11-13 18:49:43,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:43,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:43,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:43,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:43,651 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:44,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:44,428 INFO L93 Difference]: Finished difference Result 4763 states and 8787 transitions. [2021-11-13 18:49:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 69 [2021-11-13 18:49:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:44,470 INFO L225 Difference]: With dead ends: 4763 [2021-11-13 18:49:44,471 INFO L226 Difference]: Without dead ends: 2380 [2021-11-13 18:49:44,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:44,488 INFO L933 BasicCegarLoop]: 4210 mSDtfsCounter, 8680 mSDsluCounter, 8391 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 305.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8698 SdHoareTripleChecker+Valid, 12601 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.64ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 381.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:44,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8698 Valid, 12601 Invalid, 314 Unknown, 0 Unchecked, 70.64ms Time], IncrementalHoareTripleChecker [85 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 381.31ms Time] [2021-11-13 18:49:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-11-13 18:49:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2376. [2021-11-13 18:49:44,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8336192109777016) internal successors, (4276), 2336 states have internal predecessors, (4276), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 18:49:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4333 transitions. [2021-11-13 18:49:44,658 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4333 transitions. Word has length 69 [2021-11-13 18:49:44,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:44,659 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4333 transitions. [2021-11-13 18:49:44,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4333 transitions. [2021-11-13 18:49:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:44,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:44,664 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] [2021-11-13 18:49:44,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:44,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:44,884 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2021-11-13 18:49:44,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:44,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141957761] [2021-11-13 18:49:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:44,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:44,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:44,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:49:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:45,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:45,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:45,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:45,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141957761] [2021-11-13 18:49:45,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141957761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:45,419 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:45,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:45,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651623712] [2021-11-13 18:49:45,423 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:45,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:45,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:45,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:45,430 INFO L87 Difference]: Start difference. First operand 2376 states and 4333 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:46,009 INFO L93 Difference]: Finished difference Result 2621 states and 4700 transitions. [2021-11-13 18:49:46,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:46,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 69 [2021-11-13 18:49:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:46,040 INFO L225 Difference]: With dead ends: 2621 [2021-11-13 18:49:46,041 INFO L226 Difference]: Without dead ends: 2376 [2021-11-13 18:49:46,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:46,045 INFO L933 BasicCegarLoop]: 4132 mSDtfsCounter, 8304 mSDsluCounter, 8120 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8314 SdHoareTripleChecker+Valid, 12252 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 211.52ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 198.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:46,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8314 Valid, 12252 Invalid, 178 Unknown, 0 Unchecked, 211.52ms Time], IncrementalHoareTripleChecker [62 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 198.57ms Time] [2021-11-13 18:49:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-11-13 18:49:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2021-11-13 18:49:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8306174957118353) internal successors, (4269), 2336 states have internal predecessors, (4269), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 18:49:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4326 transitions. [2021-11-13 18:49:46,153 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4326 transitions. Word has length 69 [2021-11-13 18:49:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:46,154 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4326 transitions. [2021-11-13 18:49:46,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 7 states have internal predecessors, (100), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4326 transitions. [2021-11-13 18:49:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:46,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:46,157 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] [2021-11-13 18:49:46,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:46,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:46,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:46,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -432943892, now seen corresponding path program 1 times [2021-11-13 18:49:46,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:46,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242138958] [2021-11-13 18:49:46,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:46,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:46,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:46,373 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:46,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:49:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:46,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:46,830 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:46,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242138958] [2021-11-13 18:49:46,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242138958] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:46,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:46,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:46,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514500735] [2021-11-13 18:49:46,837 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:46,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:46,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:46,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:46,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:46,840 INFO L87 Difference]: Start difference. First operand 2376 states and 4326 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:47,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:47,240 INFO L93 Difference]: Finished difference Result 2621 states and 4686 transitions. [2021-11-13 18:49:47,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:47,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 69 [2021-11-13 18:49:47,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:47,260 INFO L225 Difference]: With dead ends: 2621 [2021-11-13 18:49:47,260 INFO L226 Difference]: Without dead ends: 2376 [2021-11-13 18:49:47,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:49:47,268 INFO L933 BasicCegarLoop]: 4129 mSDtfsCounter, 8295 mSDsluCounter, 8116 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8305 SdHoareTripleChecker+Valid, 12245 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.75ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:47,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8305 Valid, 12245 Invalid, 178 Unknown, 0 Unchecked, 40.75ms Time], IncrementalHoareTripleChecker [62 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 199.88ms Time] [2021-11-13 18:49:47,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-11-13 18:49:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2376. [2021-11-13 18:49:47,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8276157804459692) internal successors, (4262), 2336 states have internal predecessors, (4262), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 18:49:47,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4319 transitions. [2021-11-13 18:49:47,389 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4319 transitions. Word has length 69 [2021-11-13 18:49:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:47,389 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4319 transitions. [2021-11-13 18:49:47,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:47,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4319 transitions. [2021-11-13 18:49:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:47,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:47,394 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:47,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:47,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:47,607 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash 443075114, now seen corresponding path program 1 times [2021-11-13 18:49:47,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:47,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316750384] [2021-11-13 18:49:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:47,610 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:47,612 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:47,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:49:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:47,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:48,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:48,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316750384] [2021-11-13 18:49:48,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316750384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:48,149 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:48,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:48,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585103154] [2021-11-13 18:49:48,150 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:48,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:48,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:48,152 INFO L87 Difference]: Start difference. First operand 2376 states and 4319 transitions. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:48,569 INFO L93 Difference]: Finished difference Result 2673 states and 4750 transitions. [2021-11-13 18:49:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:48,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 69 [2021-11-13 18:49:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:48,589 INFO L225 Difference]: With dead ends: 2673 [2021-11-13 18:49:48,589 INFO L226 Difference]: Without dead ends: 2428 [2021-11-13 18:49:48,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:48,599 INFO L933 BasicCegarLoop]: 4126 mSDtfsCounter, 4243 mSDsluCounter, 8110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 190.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4253 SdHoareTripleChecker+Valid, 12236 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.11ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:48,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4253 Valid, 12236 Invalid, 197 Unknown, 0 Unchecked, 29.11ms Time], IncrementalHoareTripleChecker [36 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 232.70ms Time] [2021-11-13 18:49:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-11-13 18:49:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2428. [2021-11-13 18:49:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2428 states, 2378 states have (on average 1.8153910849453323) internal successors, (4317), 2382 states have internal predecessors, (4317), 31 states have call successors, (31), 17 states have call predecessors, (31), 17 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2021-11-13 18:49:48,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2428 states to 2428 states and 4378 transitions. [2021-11-13 18:49:48,713 INFO L78 Accepts]: Start accepts. Automaton has 2428 states and 4378 transitions. Word has length 69 [2021-11-13 18:49:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:48,718 INFO L470 AbstractCegarLoop]: Abstraction has 2428 states and 4378 transitions. [2021-11-13 18:49:48,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2428 states and 4378 transitions. [2021-11-13 18:49:48,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:48,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:48,722 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] [2021-11-13 18:49:48,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:48,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:48,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2094697434, now seen corresponding path program 1 times [2021-11-13 18:49:48,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:48,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72282212] [2021-11-13 18:49:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:48,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:48,939 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:48,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:49:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:49,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:49,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:49,412 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:49,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72282212] [2021-11-13 18:49:49,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72282212] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:49,413 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:49,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:49,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888292481] [2021-11-13 18:49:49,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:49,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:49,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:49,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:49,415 INFO L87 Difference]: Start difference. First operand 2428 states and 4378 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:49,921 INFO L93 Difference]: Finished difference Result 2777 states and 4868 transitions. [2021-11-13 18:49:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:49,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 69 [2021-11-13 18:49:49,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:49,937 INFO L225 Difference]: With dead ends: 2777 [2021-11-13 18:49:49,937 INFO L226 Difference]: Without dead ends: 2480 [2021-11-13 18:49:49,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:49,940 INFO L933 BasicCegarLoop]: 4121 mSDtfsCounter, 8331 mSDsluCounter, 8106 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 265.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8341 SdHoareTripleChecker+Valid, 12227 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.79ms SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 316.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:49,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8341 Valid, 12227 Invalid, 226 Unknown, 0 Unchecked, 33.79ms Time], IncrementalHoareTripleChecker [68 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 316.92ms Time] [2021-11-13 18:49:49,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2021-11-13 18:49:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2480. [2021-11-13 18:49:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 2424 states have (on average 1.801980198019802) internal successors, (4368), 2428 states have internal predecessors, (4368), 33 states have call successors, (33), 21 states have call predecessors, (33), 21 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2021-11-13 18:49:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 4433 transitions. [2021-11-13 18:49:50,032 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 4433 transitions. Word has length 69 [2021-11-13 18:49:50,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:50,032 INFO L470 AbstractCegarLoop]: Abstraction has 2480 states and 4433 transitions. [2021-11-13 18:49:50,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:49:50,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 4433 transitions. [2021-11-13 18:49:50,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:49:50,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:50,034 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] [2021-11-13 18:49:50,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:50,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:50,248 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:50,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1034264695, now seen corresponding path program 1 times [2021-11-13 18:49:50,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:50,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1150896416] [2021-11-13 18:49:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:50,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:50,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:50,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:49:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:50,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:50,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:50,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:50,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:50,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1150896416] [2021-11-13 18:49:50,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1150896416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:50,742 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:50,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 18:49:50,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305271034] [2021-11-13 18:49:50,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:50,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:50,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:50,748 INFO L87 Difference]: Start difference. First operand 2480 states and 4433 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:49:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:50,985 INFO L93 Difference]: Finished difference Result 3472 states and 5763 transitions. [2021-11-13 18:49:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:50,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 69 [2021-11-13 18:49:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:51,009 INFO L225 Difference]: With dead ends: 3472 [2021-11-13 18:49:51,009 INFO L226 Difference]: Without dead ends: 3124 [2021-11-13 18:49:51,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:51,016 INFO L933 BasicCegarLoop]: 4230 mSDtfsCounter, 4231 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4231 SdHoareTripleChecker+Valid, 4657 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.84ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:51,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4231 Valid, 4657 Invalid, 58 Unknown, 0 Unchecked, 17.84ms Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 76.19ms Time] [2021-11-13 18:49:51,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-13 18:49:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 3120. [2021-11-13 18:49:51,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 2968 states have (on average 1.7061994609164421) internal successors, (5064), 2978 states have internal predecessors, (5064), 87 states have call successors, (87), 61 states have call predecessors, (87), 63 states have return successors, (103), 81 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-13 18:49:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 5254 transitions. [2021-11-13 18:49:51,176 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 5254 transitions. Word has length 69 [2021-11-13 18:49:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:51,177 INFO L470 AbstractCegarLoop]: Abstraction has 3120 states and 5254 transitions. [2021-11-13 18:49:51,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:49:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 5254 transitions. [2021-11-13 18:49:51,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:51,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:51,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:51,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:51,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1810478963, now seen corresponding path program 1 times [2021-11-13 18:49:51,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:51,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996652889] [2021-11-13 18:49:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:51,400 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:51,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:51,403 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:49:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:51,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:51,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:49:51,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:49:51,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996652889] [2021-11-13 18:49:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996652889] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:51,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:51,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 18:49:51,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818688748] [2021-11-13 18:49:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:51,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:51,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:51,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:51,942 INFO L87 Difference]: Start difference. First operand 3120 states and 5254 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:52,145 INFO L93 Difference]: Finished difference Result 4318 states and 6872 transitions. [2021-11-13 18:49:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-11-13 18:49:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:52,169 INFO L225 Difference]: With dead ends: 4318 [2021-11-13 18:49:52,169 INFO L226 Difference]: Without dead ends: 3330 [2021-11-13 18:49:52,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:52,176 INFO L933 BasicCegarLoop]: 4143 mSDtfsCounter, 90 mSDsluCounter, 12468 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16611 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.91ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:52,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 16611 Invalid, 14 Unknown, 0 Unchecked, 24.91ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 15.76ms Time] [2021-11-13 18:49:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-11-13 18:49:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3138. [2021-11-13 18:49:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2986 states have (on average 1.6979236436704621) internal successors, (5070), 2996 states have internal predecessors, (5070), 87 states have call successors, (87), 61 states have call predecessors, (87), 63 states have return successors, (103), 81 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-13 18:49:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 5260 transitions. [2021-11-13 18:49:52,366 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 5260 transitions. Word has length 111 [2021-11-13 18:49:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:52,368 INFO L470 AbstractCegarLoop]: Abstraction has 3138 states and 5260 transitions. [2021-11-13 18:49:52,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 5260 transitions. [2021-11-13 18:49:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:52,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:52,372 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:52,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-13 18:49:52,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:52,589 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:52,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1264888909, now seen corresponding path program 1 times [2021-11-13 18:49:52,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:52,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875916890] [2021-11-13 18:49:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:52,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:52,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:52,593 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:52,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:49:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:49:52,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:49:53,226 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:53,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875916890] [2021-11-13 18:49:53,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875916890] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:53,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:53,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 18:49:53,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217281655] [2021-11-13 18:49:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:53,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:53,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:53,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:53,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:53,229 INFO L87 Difference]: Start difference. First operand 3138 states and 5260 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:53,462 INFO L93 Difference]: Finished difference Result 4270 states and 6766 transitions. [2021-11-13 18:49:53,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:53,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-11-13 18:49:53,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:53,485 INFO L225 Difference]: With dead ends: 4270 [2021-11-13 18:49:53,485 INFO L226 Difference]: Without dead ends: 3264 [2021-11-13 18:49:53,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:53,491 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 49 mSDsluCounter, 12431 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16570 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.98ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:53,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 16570 Invalid, 14 Unknown, 0 Unchecked, 26.98ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 12.24ms Time] [2021-11-13 18:49:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-11-13 18:49:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 3156. [2021-11-13 18:49:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3004 states have (on average 1.6897470039946738) internal successors, (5076), 3014 states have internal predecessors, (5076), 87 states have call successors, (87), 61 states have call predecessors, (87), 63 states have return successors, (103), 81 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-13 18:49:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5266 transitions. [2021-11-13 18:49:53,689 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5266 transitions. Word has length 111 [2021-11-13 18:49:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:53,690 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 5266 transitions. [2021-11-13 18:49:53,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5266 transitions. [2021-11-13 18:49:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:53,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:53,693 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:53,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:53,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:53,916 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1489444851, now seen corresponding path program 1 times [2021-11-13 18:49:53,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:53,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979126450] [2021-11-13 18:49:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:53,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:53,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:53,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:53,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:49:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:49:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:54,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:49:54,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 18:49:54,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:54,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979126450] [2021-11-13 18:49:54,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979126450] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:54,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:54,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 18:49:54,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629989860] [2021-11-13 18:49:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:54,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:54,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:54,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:54,485 INFO L87 Difference]: Start difference. First operand 3156 states and 5266 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:54,661 INFO L93 Difference]: Finished difference Result 4222 states and 6670 transitions. [2021-11-13 18:49:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:49:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-11-13 18:49:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:54,699 INFO L225 Difference]: With dead ends: 4222 [2021-11-13 18:49:54,699 INFO L226 Difference]: Without dead ends: 3198 [2021-11-13 18:49:54,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:54,705 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 10 mSDsluCounter, 12416 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16555 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.46ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:54,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16555 Invalid, 14 Unknown, 0 Unchecked, 16.46ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 21.71ms Time] [2021-11-13 18:49:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2021-11-13 18:49:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3174. [2021-11-13 18:49:54,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 3022 states have (on average 1.6816677696889477) internal successors, (5082), 3032 states have internal predecessors, (5082), 87 states have call successors, (87), 61 states have call predecessors, (87), 63 states have return successors, (103), 81 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-13 18:49:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 5272 transitions. [2021-11-13 18:49:54,846 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 5272 transitions. Word has length 111 [2021-11-13 18:49:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:54,846 INFO L470 AbstractCegarLoop]: Abstraction has 3174 states and 5272 transitions. [2021-11-13 18:49:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:49:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 5272 transitions. [2021-11-13 18:49:54,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:54,849 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:54,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:54,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:55,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:55,063 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1271995443, now seen corresponding path program 1 times [2021-11-13 18:49:55,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:55,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1042287775] [2021-11-13 18:49:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:55,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:55,065 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:55,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:49:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:49:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:49:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:49:55,805 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:55,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1042287775] [2021-11-13 18:49:55,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1042287775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:55,806 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:55,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 18:49:55,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57651627] [2021-11-13 18:49:55,806 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:55,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:49:55,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:55,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:49:55,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:55,808 INFO L87 Difference]: Start difference. First operand 3174 states and 5272 transitions. Second operand has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:49:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:56,344 INFO L93 Difference]: Finished difference Result 4377 states and 6769 transitions. [2021-11-13 18:49:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:49:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 111 [2021-11-13 18:49:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:56,358 INFO L225 Difference]: With dead ends: 4377 [2021-11-13 18:49:56,359 INFO L226 Difference]: Without dead ends: 3334 [2021-11-13 18:49:56,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:49:56,364 INFO L933 BasicCegarLoop]: 4143 mSDtfsCounter, 8268 mSDsluCounter, 8108 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 268.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8277 SdHoareTripleChecker+Valid, 12251 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.93ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 327.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:56,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8277 Valid, 12251 Invalid, 306 Unknown, 0 Unchecked, 23.93ms Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 327.65ms Time] [2021-11-13 18:49:56,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-11-13 18:49:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3296. [2021-11-13 18:49:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 3138 states have (on average 1.6516889738687062) internal successors, (5183), 3148 states have internal predecessors, (5183), 87 states have call successors, (87), 67 states have call predecessors, (87), 69 states have return successors, (103), 81 states have call predecessors, (103), 85 states have call successors, (103) [2021-11-13 18:49:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 5373 transitions. [2021-11-13 18:49:56,516 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 5373 transitions. Word has length 111 [2021-11-13 18:49:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:56,517 INFO L470 AbstractCegarLoop]: Abstraction has 3296 states and 5373 transitions. [2021-11-13 18:49:56,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.571428571428573) internal successors, (130), 7 states have internal predecessors, (130), 4 states have call successors, (15), 5 states have call predecessors, (15), 6 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:49:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 5373 transitions. [2021-11-13 18:49:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:56,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:56,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:56,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:56,737 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1336792015, now seen corresponding path program 1 times [2021-11-13 18:49:56,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:56,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076374144] [2021-11-13 18:49:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:56,738 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:56,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:56,739 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:56,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:49:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:49:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:49:57,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:49:57,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:57,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076374144] [2021-11-13 18:49:57,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076374144] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:57,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:57,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 18:49:57,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316540155] [2021-11-13 18:49:57,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:57,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:49:57,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:57,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:49:57,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:57,614 INFO L87 Difference]: Start difference. First operand 3296 states and 5373 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:49:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:58,047 INFO L93 Difference]: Finished difference Result 5463 states and 8002 transitions. [2021-11-13 18:49:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:49:58,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 111 [2021-11-13 18:49:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:58,064 INFO L225 Difference]: With dead ends: 5463 [2021-11-13 18:49:58,064 INFO L226 Difference]: Without dead ends: 4300 [2021-11-13 18:49:58,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:49:58,070 INFO L933 BasicCegarLoop]: 4202 mSDtfsCounter, 8177 mSDsluCounter, 4222 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8183 SdHoareTripleChecker+Valid, 8424 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.62ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 181.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:58,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8183 Valid, 8424 Invalid, 163 Unknown, 0 Unchecked, 22.62ms Time], IncrementalHoareTripleChecker [58 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 181.48ms Time] [2021-11-13 18:49:58,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-11-13 18:49:58,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 4296. [2021-11-13 18:49:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4296 states, 3997 states have (on average 1.548911683762822) internal successors, (6191), 4021 states have internal predecessors, (6191), 159 states have call successors, (159), 121 states have call predecessors, (159), 138 states have return successors, (223), 155 states have call predecessors, (223), 157 states have call successors, (223) [2021-11-13 18:49:58,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6573 transitions. [2021-11-13 18:49:58,289 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6573 transitions. Word has length 111 [2021-11-13 18:49:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 4296 states and 6573 transitions. [2021-11-13 18:49:58,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:49:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6573 transitions. [2021-11-13 18:49:58,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 18:49:58,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:58,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:58,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:58,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:58,509 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:58,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash -529916659, now seen corresponding path program 1 times [2021-11-13 18:49:58,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:58,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1693909810] [2021-11-13 18:49:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:58,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:58,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:58,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:58,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:49:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:58,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:49:58,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:49:58,944 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:49:58,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1693909810] [2021-11-13 18:49:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1693909810] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:58,944 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:58,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:49:58,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134303180] [2021-11-13 18:49:58,945 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:58,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:58,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:49:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:49:58,946 INFO L87 Difference]: Start difference. First operand 4296 states and 6573 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:49:59,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:59,213 INFO L93 Difference]: Finished difference Result 6454 states and 9160 transitions. [2021-11-13 18:49:59,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:59,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 111 [2021-11-13 18:49:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:59,228 INFO L225 Difference]: With dead ends: 6454 [2021-11-13 18:49:59,229 INFO L226 Difference]: Without dead ends: 4291 [2021-11-13 18:49:59,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:49:59,236 INFO L933 BasicCegarLoop]: 4137 mSDtfsCounter, 172 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 8095 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:59,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 8095 Invalid, 2 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 11.75ms Time] [2021-11-13 18:49:59,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-11-13 18:49:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4291. [2021-11-13 18:49:59,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 3995 states have (on average 1.548685857321652) internal successors, (6187), 4018 states have internal predecessors, (6187), 156 states have call successors, (156), 121 states have call predecessors, (156), 138 states have return successors, (220), 152 states have call predecessors, (220), 154 states have call successors, (220) [2021-11-13 18:49:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 6563 transitions. [2021-11-13 18:49:59,457 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 6563 transitions. Word has length 111 [2021-11-13 18:49:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:59,457 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 6563 transitions. [2021-11-13 18:49:59,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:49:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 6563 transitions. [2021-11-13 18:49:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:49:59,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:59,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:59,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:59,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:49:59,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:59,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:59,676 INFO L85 PathProgramCache]: Analyzing trace with hash -448833456, now seen corresponding path program 1 times [2021-11-13 18:49:59,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:49:59,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205274990] [2021-11-13 18:49:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:59,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:49:59,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:49:59,678 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:49:59,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:49:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:49:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:00,008 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:50:00,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:50:00,458 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:00,458 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205274990] [2021-11-13 18:50:00,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205274990] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:00,458 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:00,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 18:50:00,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467118660] [2021-11-13 18:50:00,460 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:00,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:50:00,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:50:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:00,463 INFO L87 Difference]: Start difference. First operand 4291 states and 6563 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:50:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:00,998 INFO L93 Difference]: Finished difference Result 8211 states and 11304 transitions. [2021-11-13 18:50:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:50:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 112 [2021-11-13 18:50:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:01,022 INFO L225 Difference]: With dead ends: 8211 [2021-11-13 18:50:01,022 INFO L226 Difference]: Without dead ends: 6053 [2021-11-13 18:50:01,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:50:01,030 INFO L933 BasicCegarLoop]: 4185 mSDtfsCounter, 8237 mSDsluCounter, 4154 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8243 SdHoareTripleChecker+Valid, 8339 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.15ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 171.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:01,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8243 Valid, 8339 Invalid, 170 Unknown, 0 Unchecked, 20.15ms Time], IncrementalHoareTripleChecker [82 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 171.13ms Time] [2021-11-13 18:50:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6053 states. [2021-11-13 18:50:01,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6053 to 6049. [2021-11-13 18:50:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6049 states, 5498 states have (on average 1.4463441251364133) internal successors, (7952), 5548 states have internal predecessors, (7952), 285 states have call successors, (285), 217 states have call predecessors, (285), 264 states have return successors, (441), 285 states have call predecessors, (441), 283 states have call successors, (441) [2021-11-13 18:50:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6049 states to 6049 states and 8678 transitions. [2021-11-13 18:50:01,380 INFO L78 Accepts]: Start accepts. Automaton has 6049 states and 8678 transitions. Word has length 112 [2021-11-13 18:50:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:01,381 INFO L470 AbstractCegarLoop]: Abstraction has 6049 states and 8678 transitions. [2021-11-13 18:50:01,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:50:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 6049 states and 8678 transitions. [2021-11-13 18:50:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:50:01,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:01,387 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:01,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:01,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:01,601 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1979425166, now seen corresponding path program 1 times [2021-11-13 18:50:01,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:01,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569428570] [2021-11-13 18:50:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:01,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:01,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:01,603 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:01,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:50:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:50:01,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 18:50:02,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:02,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569428570] [2021-11-13 18:50:02,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569428570] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:02,018 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:02,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:50:02,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204450202] [2021-11-13 18:50:02,018 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:02,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:02,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:02,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:02,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:02,020 INFO L87 Difference]: Start difference. First operand 6049 states and 8678 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:50:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:02,412 INFO L93 Difference]: Finished difference Result 9961 states and 13373 transitions. [2021-11-13 18:50:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 112 [2021-11-13 18:50:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:02,436 INFO L225 Difference]: With dead ends: 9961 [2021-11-13 18:50:02,436 INFO L226 Difference]: Without dead ends: 6045 [2021-11-13 18:50:02,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:02,449 INFO L933 BasicCegarLoop]: 4136 mSDtfsCounter, 170 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 8094 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.74ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:02,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 8094 Invalid, 2 Unknown, 0 Unchecked, 7.74ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 7.02ms Time] [2021-11-13 18:50:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6045 states. [2021-11-13 18:50:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6045 to 6045. [2021-11-13 18:50:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6045 states, 5497 states have (on average 1.4462434054939057) internal successors, (7950), 5546 states have internal predecessors, (7950), 282 states have call successors, (282), 217 states have call predecessors, (282), 264 states have return successors, (438), 282 states have call predecessors, (438), 280 states have call successors, (438) [2021-11-13 18:50:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6045 states to 6045 states and 8670 transitions. [2021-11-13 18:50:02,912 INFO L78 Accepts]: Start accepts. Automaton has 6045 states and 8670 transitions. Word has length 112 [2021-11-13 18:50:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:02,913 INFO L470 AbstractCegarLoop]: Abstraction has 6045 states and 8670 transitions. [2021-11-13 18:50:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:50:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6045 states and 8670 transitions. [2021-11-13 18:50:02,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 18:50:02,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:02,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:02,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:03,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:03,132 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:03,133 INFO L85 PathProgramCache]: Analyzing trace with hash -148341909, now seen corresponding path program 1 times [2021-11-13 18:50:03,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:03,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466861807] [2021-11-13 18:50:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:03,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:03,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:03,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:03,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:50:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:50:03,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:50:03,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:03,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466861807] [2021-11-13 18:50:03,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466861807] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:03,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:03,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 5 [2021-11-13 18:50:03,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833195570] [2021-11-13 18:50:03,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:03,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:50:03,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:03,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:50:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:03,615 INFO L87 Difference]: Start difference. First operand 6045 states and 8670 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:50:04,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:04,277 INFO L93 Difference]: Finished difference Result 12823 states and 16916 transitions. [2021-11-13 18:50:04,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:50:04,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 113 [2021-11-13 18:50:04,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:04,303 INFO L225 Difference]: With dead ends: 12823 [2021-11-13 18:50:04,304 INFO L226 Difference]: Without dead ends: 6993 [2021-11-13 18:50:04,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:04,322 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4388 mSDsluCounter, 4246 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4388 SdHoareTripleChecker+Valid, 8518 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.37ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 122.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:04,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4388 Valid, 8518 Invalid, 125 Unknown, 0 Unchecked, 15.37ms Time], IncrementalHoareTripleChecker [37 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 122.58ms Time] [2021-11-13 18:50:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6993 states. [2021-11-13 18:50:04,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6993 to 6993. [2021-11-13 18:50:04,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6993 states, 6305 states have (on average 1.3971451229183187) internal successors, (8809), 6360 states have internal predecessors, (8809), 358 states have call successors, (358), 273 states have call predecessors, (358), 328 states have return successors, (494), 360 states have call predecessors, (494), 356 states have call successors, (494) [2021-11-13 18:50:04,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6993 states to 6993 states and 9661 transitions. [2021-11-13 18:50:04,744 INFO L78 Accepts]: Start accepts. Automaton has 6993 states and 9661 transitions. Word has length 113 [2021-11-13 18:50:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:04,746 INFO L470 AbstractCegarLoop]: Abstraction has 6993 states and 9661 transitions. [2021-11-13 18:50:04,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:50:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6993 states and 9661 transitions. [2021-11-13 18:50:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 18:50:04,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:04,751 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:50:04,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:04,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:04,969 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:04,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:04,969 INFO L85 PathProgramCache]: Analyzing trace with hash 734101987, now seen corresponding path program 1 times [2021-11-13 18:50:04,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:04,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683027426] [2021-11-13 18:50:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:04,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:04,971 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:04,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:50:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:50:05,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:50:05,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:05,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683027426] [2021-11-13 18:50:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683027426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:05,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:05,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:50:05,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951626925] [2021-11-13 18:50:05,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:05,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:05,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:05,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:05,613 INFO L87 Difference]: Start difference. First operand 6993 states and 9661 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 18:50:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:05,996 INFO L93 Difference]: Finished difference Result 12846 states and 16513 transitions. [2021-11-13 18:50:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 144 [2021-11-13 18:50:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:06,024 INFO L225 Difference]: With dead ends: 12846 [2021-11-13 18:50:06,024 INFO L226 Difference]: Without dead ends: 7985 [2021-11-13 18:50:06,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:06,037 INFO L933 BasicCegarLoop]: 4145 mSDtfsCounter, 4023 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4023 SdHoareTripleChecker+Valid, 4300 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.65ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:06,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4023 Valid, 4300 Invalid, 10 Unknown, 0 Unchecked, 6.65ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 7.37ms Time] [2021-11-13 18:50:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-11-13 18:50:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 7953. [2021-11-13 18:50:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7125 states have (on average 1.3635087719298247) internal successors, (9715), 7186 states have internal predecessors, (9715), 434 states have call successors, (434), 329 states have call predecessors, (434), 392 states have return successors, (584), 438 states have call predecessors, (584), 432 states have call successors, (584) [2021-11-13 18:50:06,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 10733 transitions. [2021-11-13 18:50:06,512 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 10733 transitions. Word has length 144 [2021-11-13 18:50:06,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:06,513 INFO L470 AbstractCegarLoop]: Abstraction has 7953 states and 10733 transitions. [2021-11-13 18:50:06,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 18:50:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 10733 transitions. [2021-11-13 18:50:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:50:06,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:06,521 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, 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] [2021-11-13 18:50:06,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:06,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:06,735 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1542185064, now seen corresponding path program 1 times [2021-11-13 18:50:06,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:06,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706429272] [2021-11-13 18:50:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:06,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:06,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:06,738 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:06,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:50:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:06,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:06,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:50:07,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-13 18:50:07,463 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:07,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706429272] [2021-11-13 18:50:07,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706429272] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:07,464 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:07,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:50:07,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967189464] [2021-11-13 18:50:07,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:07,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:50:07,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:50:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:07,467 INFO L87 Difference]: Start difference. First operand 7953 states and 10733 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:50:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:07,933 INFO L93 Difference]: Finished difference Result 12817 states and 16423 transitions. [2021-11-13 18:50:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:50:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 163 [2021-11-13 18:50:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:07,960 INFO L225 Difference]: With dead ends: 12817 [2021-11-13 18:50:07,960 INFO L226 Difference]: Without dead ends: 7957 [2021-11-13 18:50:07,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:07,976 INFO L933 BasicCegarLoop]: 4257 mSDtfsCounter, 284 mSDsluCounter, 4152 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 8409 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.33ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:07,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 8409 Invalid, 37 Unknown, 0 Unchecked, 9.33ms Time], IncrementalHoareTripleChecker [25 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 46.28ms Time] [2021-11-13 18:50:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2021-11-13 18:50:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7953. [2021-11-13 18:50:08,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7953 states, 7125 states have (on average 1.360982456140351) internal successors, (9697), 7186 states have internal predecessors, (9697), 434 states have call successors, (434), 329 states have call predecessors, (434), 392 states have return successors, (578), 438 states have call predecessors, (578), 432 states have call successors, (578) [2021-11-13 18:50:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7953 states to 7953 states and 10709 transitions. [2021-11-13 18:50:08,476 INFO L78 Accepts]: Start accepts. Automaton has 7953 states and 10709 transitions. Word has length 163 [2021-11-13 18:50:08,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:08,477 INFO L470 AbstractCegarLoop]: Abstraction has 7953 states and 10709 transitions. [2021-11-13 18:50:08,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 18:50:08,478 INFO L276 IsEmpty]: Start isEmpty. Operand 7953 states and 10709 transitions. [2021-11-13 18:50:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-13 18:50:08,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:08,486 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:50:08,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:08,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:08,701 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1950420067, now seen corresponding path program 1 times [2021-11-13 18:50:08,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:08,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347550164] [2021-11-13 18:50:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:08,703 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:08,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:08,704 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:08,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:50:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:08,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-13 18:50:09,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-11-13 18:50:09,543 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:09,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347550164] [2021-11-13 18:50:09,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347550164] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:09,543 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:09,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:50:09,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093637491] [2021-11-13 18:50:09,543 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:09,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:09,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:09,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:09,545 INFO L87 Difference]: Start difference. First operand 7953 states and 10709 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 18:50:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:10,002 INFO L93 Difference]: Finished difference Result 14620 states and 18407 transitions. [2021-11-13 18:50:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 195 [2021-11-13 18:50:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:10,031 INFO L225 Difference]: With dead ends: 14620 [2021-11-13 18:50:10,031 INFO L226 Difference]: Without dead ends: 8799 [2021-11-13 18:50:10,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:10,047 INFO L933 BasicCegarLoop]: 4174 mSDtfsCounter, 4004 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4004 SdHoareTripleChecker+Valid, 4329 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:10,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4004 Valid, 4329 Invalid, 10 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 21.91ms Time] [2021-11-13 18:50:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8799 states. [2021-11-13 18:50:10,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8799 to 8759. [2021-11-13 18:50:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8759 states, 7811 states have (on average 1.3361925489694022) internal successors, (10437), 7876 states have internal predecessors, (10437), 502 states have call successors, (502), 377 states have call predecessors, (502), 444 states have return successors, (650), 506 states have call predecessors, (650), 500 states have call successors, (650) [2021-11-13 18:50:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8759 states to 8759 states and 11589 transitions. [2021-11-13 18:50:10,595 INFO L78 Accepts]: Start accepts. Automaton has 8759 states and 11589 transitions. Word has length 195 [2021-11-13 18:50:10,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:10,595 INFO L470 AbstractCegarLoop]: Abstraction has 8759 states and 11589 transitions. [2021-11-13 18:50:10,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-13 18:50:10,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8759 states and 11589 transitions. [2021-11-13 18:50:10,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 18:50:10,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:10,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:50:10,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:10,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:10,821 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2004541226, now seen corresponding path program 1 times [2021-11-13 18:50:10,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:10,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869460766] [2021-11-13 18:50:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:10,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:10,825 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:10,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:50:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:10,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:50:11,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-13 18:50:11,536 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:11,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869460766] [2021-11-13 18:50:11,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869460766] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:11,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:11,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-13 18:50:11,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125260134] [2021-11-13 18:50:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:11,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:11,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:11,539 INFO L87 Difference]: Start difference. First operand 8759 states and 11589 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:50:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:11,730 INFO L93 Difference]: Finished difference Result 10950 states and 14087 transitions. [2021-11-13 18:50:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:11,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 199 [2021-11-13 18:50:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:11,742 INFO L225 Difference]: With dead ends: 10950 [2021-11-13 18:50:11,742 INFO L226 Difference]: Without dead ends: 4058 [2021-11-13 18:50:11,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:11,756 INFO L933 BasicCegarLoop]: 4216 mSDtfsCounter, 134 mSDsluCounter, 4098 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 8314 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.25ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:11,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 8314 Invalid, 9 Unknown, 0 Unchecked, 5.25ms Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 19.30ms Time] [2021-11-13 18:50:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-11-13 18:50:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4058. [2021-11-13 18:50:11,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 3768 states have (on average 1.5286624203821657) internal successors, (5760), 3784 states have internal predecessors, (5760), 165 states have call successors, (165), 115 states have call predecessors, (165), 123 states have return successors, (179), 159 states have call predecessors, (179), 163 states have call successors, (179) [2021-11-13 18:50:11,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 6104 transitions. [2021-11-13 18:50:11,944 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 6104 transitions. Word has length 199 [2021-11-13 18:50:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:11,945 INFO L470 AbstractCegarLoop]: Abstraction has 4058 states and 6104 transitions. [2021-11-13 18:50:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:50:11,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 6104 transitions. [2021-11-13 18:50:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 18:50:11,950 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:11,950 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, 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] [2021-11-13 18:50:11,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-11-13 18:50:12,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:12,169 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:12,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash 696339958, now seen corresponding path program 1 times [2021-11-13 18:50:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:12,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723490370] [2021-11-13 18:50:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:12,171 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:12,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:12,172 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:12,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:50:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:12,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:12,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-13 18:50:12,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-13 18:50:12,907 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:12,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723490370] [2021-11-13 18:50:12,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723490370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:12,907 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:12,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 4 [2021-11-13 18:50:12,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352846438] [2021-11-13 18:50:12,907 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:12,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:50:12,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:50:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:12,909 INFO L87 Difference]: Start difference. First operand 4058 states and 6104 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:50:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:13,169 INFO L93 Difference]: Finished difference Result 5394 states and 7633 transitions. [2021-11-13 18:50:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:50:13,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 199 [2021-11-13 18:50:13,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:13,181 INFO L225 Difference]: With dead ends: 5394 [2021-11-13 18:50:13,181 INFO L226 Difference]: Without dead ends: 4058 [2021-11-13 18:50:13,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:13,185 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 4222 mSDsluCounter, 4188 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4222 SdHoareTripleChecker+Valid, 8433 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.66ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:13,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4222 Valid, 8433 Invalid, 70 Unknown, 0 Unchecked, 8.66ms Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 78.84ms Time] [2021-11-13 18:50:13,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-11-13 18:50:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4058. [2021-11-13 18:50:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 3768 states have (on average 1.5233545647558386) internal successors, (5740), 3784 states have internal predecessors, (5740), 165 states have call successors, (165), 115 states have call predecessors, (165), 123 states have return successors, (179), 159 states have call predecessors, (179), 163 states have call successors, (179) [2021-11-13 18:50:13,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 6084 transitions. [2021-11-13 18:50:13,375 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 6084 transitions. Word has length 199 [2021-11-13 18:50:13,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:13,375 INFO L470 AbstractCegarLoop]: Abstraction has 4058 states and 6084 transitions. [2021-11-13 18:50:13,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:50:13,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 6084 transitions. [2021-11-13 18:50:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 18:50:13,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:13,380 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, 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] [2021-11-13 18:50:13,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:13,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:13,594 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:13,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1725156702, now seen corresponding path program 1 times [2021-11-13 18:50:13,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:13,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [399524815] [2021-11-13 18:50:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:13,596 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:13,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:13,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 18:50:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:13,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:50:14,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 47 proven. 41 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:50:14,341 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:14,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [399524815] [2021-11-13 18:50:14,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [399524815] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:14,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:14,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-13 18:50:14,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178910867] [2021-11-13 18:50:14,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:14,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:14,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:14,343 INFO L87 Difference]: Start difference. First operand 4058 states and 6084 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:50:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:14,468 INFO L93 Difference]: Finished difference Result 5629 states and 7840 transitions. [2021-11-13 18:50:14,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:14,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 201 [2021-11-13 18:50:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:14,482 INFO L225 Difference]: With dead ends: 5629 [2021-11-13 18:50:14,482 INFO L226 Difference]: Without dead ends: 4058 [2021-11-13 18:50:14,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:50:14,487 INFO L933 BasicCegarLoop]: 4199 mSDtfsCounter, 123 mSDsluCounter, 4071 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 8270 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:14,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 8270 Invalid, 7 Unknown, 0 Unchecked, 5.11ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 9.21ms Time] [2021-11-13 18:50:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-11-13 18:50:14,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4058. [2021-11-13 18:50:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 3768 states have (on average 1.5185774946921444) internal successors, (5722), 3784 states have internal predecessors, (5722), 165 states have call successors, (165), 115 states have call predecessors, (165), 123 states have return successors, (179), 159 states have call predecessors, (179), 163 states have call successors, (179) [2021-11-13 18:50:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 6066 transitions. [2021-11-13 18:50:14,682 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 6066 transitions. Word has length 201 [2021-11-13 18:50:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:14,683 INFO L470 AbstractCegarLoop]: Abstraction has 4058 states and 6066 transitions. [2021-11-13 18:50:14,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-13 18:50:14,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 6066 transitions. [2021-11-13 18:50:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-13 18:50:14,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:14,688 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, 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] [2021-11-13 18:50:14,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:14,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:14,902 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:14,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:14,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1365063130, now seen corresponding path program 1 times [2021-11-13 18:50:14,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:14,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246324596] [2021-11-13 18:50:14,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:14,903 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:14,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:14,905 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:14,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 18:50:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:15,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:50:15,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:50:15,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-13 18:50:15,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:15,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246324596] [2021-11-13 18:50:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246324596] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:15,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:50:15,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-13 18:50:15,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846425093] [2021-11-13 18:50:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:15,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:50:15,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:50:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:15,862 INFO L87 Difference]: Start difference. First operand 4058 states and 6066 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 18:50:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:16,279 INFO L93 Difference]: Finished difference Result 4064 states and 6071 transitions. [2021-11-13 18:50:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:50:16,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 203 [2021-11-13 18:50:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:16,290 INFO L225 Difference]: With dead ends: 4064 [2021-11-13 18:50:16,291 INFO L226 Difference]: Without dead ends: 4061 [2021-11-13 18:50:16,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:50:16,293 INFO L933 BasicCegarLoop]: 4326 mSDtfsCounter, 4295 mSDsluCounter, 8508 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 184.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4295 SdHoareTripleChecker+Valid, 12834 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 235.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:16,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4295 Valid, 12834 Invalid, 154 Unknown, 0 Unchecked, 15.36ms Time], IncrementalHoareTripleChecker [1 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 235.57ms Time] [2021-11-13 18:50:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-11-13 18:50:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 4057. [2021-11-13 18:50:16,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4057 states, 3768 states have (on average 1.5180467091295118) internal successors, (5720), 3783 states have internal predecessors, (5720), 164 states have call successors, (164), 115 states have call predecessors, (164), 123 states have return successors, (179), 159 states have call predecessors, (179), 163 states have call successors, (179) [2021-11-13 18:50:16,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 6063 transitions. [2021-11-13 18:50:16,502 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 6063 transitions. Word has length 203 [2021-11-13 18:50:16,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:16,502 INFO L470 AbstractCegarLoop]: Abstraction has 4057 states and 6063 transitions. [2021-11-13 18:50:16,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 5 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-13 18:50:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 6063 transitions. [2021-11-13 18:50:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-13 18:50:16,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:16,508 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, 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] [2021-11-13 18:50:16,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:16,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:16,721 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:16,722 INFO L85 PathProgramCache]: Analyzing trace with hash -575528242, now seen corresponding path program 1 times [2021-11-13 18:50:16,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:16,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310450973] [2021-11-13 18:50:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:16,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:16,723 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:16,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 18:50:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:50:16,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 18:50:17,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:50:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 18:50:17,465 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:50:17,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310450973] [2021-11-13 18:50:17,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310450973] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:50:17,467 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:50:17,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:50:17,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985114698] [2021-11-13 18:50:17,468 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:50:17,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:50:17,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:50:17,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:50:17,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:17,470 INFO L87 Difference]: Start difference. First operand 4057 states and 6063 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:50:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:50:17,662 INFO L93 Difference]: Finished difference Result 5368 states and 7573 transitions. [2021-11-13 18:50:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:50:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 207 [2021-11-13 18:50:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:50:17,671 INFO L225 Difference]: With dead ends: 5368 [2021-11-13 18:50:17,671 INFO L226 Difference]: Without dead ends: 4373 [2021-11-13 18:50:17,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:50:17,674 INFO L933 BasicCegarLoop]: 4210 mSDtfsCounter, 58 mSDsluCounter, 4131 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 8341 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:50:17,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 8341 Invalid, 12 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 10.32ms Time] [2021-11-13 18:50:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-11-13 18:50:17,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 4059. [2021-11-13 18:50:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 3770 states have (on average 1.5177718832891247) internal successors, (5722), 3785 states have internal predecessors, (5722), 164 states have call successors, (164), 115 states have call predecessors, (164), 123 states have return successors, (179), 159 states have call predecessors, (179), 163 states have call successors, (179) [2021-11-13 18:50:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 6065 transitions. [2021-11-13 18:50:17,973 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 6065 transitions. Word has length 207 [2021-11-13 18:50:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:50:17,974 INFO L470 AbstractCegarLoop]: Abstraction has 4059 states and 6065 transitions. [2021-11-13 18:50:17,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 18:50:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 6065 transitions. [2021-11-13 18:50:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-13 18:50:17,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:50:17,979 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, 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] [2021-11-13 18:50:17,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:18,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:18,191 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:50:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:50:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 567683991, now seen corresponding path program 1 times [2021-11-13 18:50:18,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:50:18,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490068257] [2021-11-13 18:50:18,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:18,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:50:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:50:18,193 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:50:18,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-13 18:50:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:50:18,344 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:50:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:50:18,773 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-13 18:50:18,773 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:50:18,774 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 18:50:18,776 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 18:50:18,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-13 18:50:18,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:50:18,995 INFO L732 BasicCegarLoop]: Path program 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] [2021-11-13 18:50:19,001 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:50:19,083 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:50:19,090 INFO L158 Benchmark]: Toolchain (without parser) took 53137.98ms. Allocated memory was 86.0MB in the beginning and 2.1GB in the end (delta: 2.0GB). Free memory was 49.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 251.6MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,090 INFO L158 Benchmark]: CDTParser took 0.71ms. Allocated memory is still 56.6MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:50:19,091 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4478.56ms. Allocated memory was 86.0MB in the beginning and 228.6MB in the end (delta: 142.6MB). Free memory was 49.8MB in the beginning and 117.8MB in the end (delta: -68.0MB). Peak memory consumption was 109.5MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,091 INFO L158 Benchmark]: Boogie Procedure Inliner took 600.93ms. Allocated memory is still 228.6MB. Free memory was 117.8MB in the beginning and 92.1MB in the end (delta: 25.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,092 INFO L158 Benchmark]: Boogie Preprocessor took 768.16ms. Allocated memory was 228.6MB in the beginning and 457.2MB in the end (delta: 228.6MB). Free memory was 92.1MB in the beginning and 309.7MB in the end (delta: -217.6MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,092 INFO L158 Benchmark]: RCFGBuilder took 10877.44ms. Allocated memory was 457.2MB in the beginning and 914.4MB in the end (delta: 457.2MB). Free memory was 309.7MB in the beginning and 627.7MB in the end (delta: -318.0MB). Peak memory consumption was 309.0MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,093 INFO L158 Benchmark]: TraceAbstraction took 36404.09ms. Allocated memory was 914.4MB in the beginning and 2.1GB in the end (delta: 1.1GB). Free memory was 627.7MB in the beginning and 1.8GB in the end (delta: -1.1GB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. [2021-11-13 18:50:19,097 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71ms. Allocated memory is still 56.6MB. Free memory was 37.1MB in the beginning and 37.0MB in the end (delta: 43.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4478.56ms. Allocated memory was 86.0MB in the beginning and 228.6MB in the end (delta: 142.6MB). Free memory was 49.8MB in the beginning and 117.8MB in the end (delta: -68.0MB). Peak memory consumption was 109.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 600.93ms. Allocated memory is still 228.6MB. Free memory was 117.8MB in the beginning and 92.1MB in the end (delta: 25.6MB). Peak memory consumption was 77.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 768.16ms. Allocated memory was 228.6MB in the beginning and 457.2MB in the end (delta: 228.6MB). Free memory was 92.1MB in the beginning and 309.7MB in the end (delta: -217.6MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. * RCFGBuilder took 10877.44ms. Allocated memory was 457.2MB in the beginning and 914.4MB in the end (delta: 457.2MB). Free memory was 309.7MB in the beginning and 627.7MB in the end (delta: -318.0MB). Peak memory consumption was 309.0MB. Max. memory is 16.1GB. * TraceAbstraction took 36404.09ms. Allocated memory was 914.4MB in the beginning and 2.1GB in the end (delta: 1.1GB). Free memory was 627.7MB in the beginning and 1.8GB in the end (delta: -1.1GB). Peak memory consumption was 1.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:50:19,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_56e45466-a397-4430-9c3a-ea5ef6511035/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null