./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.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_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/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_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/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_45529342-fc6b-4078-8244-3b8bd0f4f85d/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 212f1e6cc1aae5a1223162e16d5bd8071b486da78643961fa0a66e81c45b8eae --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:52:40,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:52:40,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:52:40,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:52:40,326 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:52:40,332 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:52:40,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:52:40,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:52:40,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:52:40,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:52:40,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:52:40,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:52:40,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:52:40,356 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:52:40,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:52:40,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:52:40,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:52:40,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:52:40,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:52:40,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:52:40,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:52:40,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:52:40,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:52:40,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:52:40,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:52:40,398 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:52:40,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:52:40,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:52:40,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:52:40,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:52:40,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:52:40,405 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:52:40,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:52:40,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:52:40,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:52:40,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:52:40,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:52:40,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:52:40,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:52:40,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:52:40,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:52:40,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:52:40,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:52:40,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:52:40,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:52:40,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:52:40,442 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:52:40,442 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:52:40,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:52:40,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:52:40,443 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:52:40,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:52:40,443 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:52:40,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:52:40,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:52:40,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:52:40,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:52:40,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:52:40,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:52:40,445 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:52:40,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:52:40,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:52:40,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:52:40,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:52:40,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:52:40,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:52:40,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:52:40,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:52:40,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:52:40,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:52:40,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:52:40,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:52:40,449 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:52:40,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:52:40,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:52:40,450 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:52:40,450 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_45529342-fc6b-4078-8244-3b8bd0f4f85d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 212f1e6cc1aae5a1223162e16d5bd8071b486da78643961fa0a66e81c45b8eae [2021-11-13 18:52:40,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:52:40,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:52:40,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:52:40,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:52:40,792 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:52:40,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c [2021-11-13 18:52:40,876 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/data/fb427cc10/01755d5bbf8344d7b38bad785b048843/FLAGc0bdfc74b [2021-11-13 18:52:42,006 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:52:42,007 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c [2021-11-13 18:52:42,063 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/data/fb427cc10/01755d5bbf8344d7b38bad785b048843/FLAGc0bdfc74b [2021-11-13 18:52:42,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/data/fb427cc10/01755d5bbf8344d7b38bad785b048843 [2021-11-13 18:52:42,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:52:42,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:52:42,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:52:42,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:52:42,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:52:42,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:52:42" (1/1) ... [2021-11-13 18:52:42,258 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d62f547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:42, skipping insertion in model container [2021-11-13 18:52:42,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:52:42" (1/1) ... [2021-11-13 18:52:42,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:52:42,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:52:44,994 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_45529342-fc6b-4078-8244-3b8bd0f4f85d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c[380593,380606] [2021-11-13 18:52:45,033 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_45529342-fc6b-4078-8244-3b8bd0f4f85d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c[383339,383352] [2021-11-13 18:52:45,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:52:45,390 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:52:46,638 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_45529342-fc6b-4078-8244-3b8bd0f4f85d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c[380593,380606] [2021-11-13 18:52:46,650 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_45529342-fc6b-4078-8244-3b8bd0f4f85d/sv-benchmarks/c/combinations/Problem05_label49+token_ring.07.cil-1.c[383339,383352] [2021-11-13 18:52:46,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:52:46,745 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:52:46,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46 WrapperNode [2021-11-13 18:52:46,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:52:46,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:46,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:52:46,747 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:52:46,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:46,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:52:47,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:52:47,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:52:47,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:52:47,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:52:47,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:52:47,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:52:47,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:52:47,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (1/1) ... [2021-11-13 18:52:47,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:52:47,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:52:47,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:52:48,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:52:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:52:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 18:52:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 18:52:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 18:52:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 18:52:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 18:52:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 18:52:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 18:52:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 18:52:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 18:52:48,132 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 18:52:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 18:52:48,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 18:52:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:52:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:52:48,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:52:56,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:52:56,300 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-13 18:52:56,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:56 BoogieIcfgContainer [2021-11-13 18:52:56,308 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:52:56,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:52:56,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:52:56,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:52:56,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:52:42" (1/3) ... [2021-11-13 18:52:56,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aed057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:56, skipping insertion in model container [2021-11-13 18:52:56,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:52:46" (2/3) ... [2021-11-13 18:52:56,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aed057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:52:56, skipping insertion in model container [2021-11-13 18:52:56,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:52:56" (3/3) ... [2021-11-13 18:52:56,319 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.07.cil-1.c [2021-11-13 18:52:56,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:52:56,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 18:52:56,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:52:56,391 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 18:52:56,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 18:52:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 2440 states, 2410 states have (on average 1.849792531120332) internal successors, (4458), 2413 states have internal predecessors, (4458), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 18:52:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:52:56,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:56,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:56,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:56,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:56,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1176565078, now seen corresponding path program 1 times [2021-11-13 18:52:56,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:56,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599017996] [2021-11-13 18:52:56,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:56,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:56,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:52:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:56,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:52:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:57,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:52:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:52:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:52:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:57,144 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 18:52:57,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:57,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599017996] [2021-11-13 18:52:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599017996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:57,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:57,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:52:57,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463632920] [2021-11-13 18:52:57,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:57,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:52:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:52:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:52:57,208 INFO L87 Difference]: Start difference. First operand has 2440 states, 2410 states have (on average 1.849792531120332) internal successors, (4458), 2413 states have internal predecessors, (4458), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:52:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:52:58,700 INFO L93 Difference]: Finished difference Result 4955 states and 9127 transitions. [2021-11-13 18:52:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:52:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:52:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:52:58,750 INFO L225 Difference]: With dead ends: 4955 [2021-11-13 18:52:58,750 INFO L226 Difference]: Without dead ends: 2460 [2021-11-13 18:52:58,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:52:58,767 INFO L933 BasicCegarLoop]: 4453 mSDtfsCounter, 653 mSDsluCounter, 12350 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 752.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 16803 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 150.78ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 894.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:52:58,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 16803 Invalid, 493 Unknown, 0 Unchecked, 150.78ms Time], IncrementalHoareTripleChecker [50 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 894.59ms Time] [2021-11-13 18:52:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-11-13 18:52:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2373. [2021-11-13 18:52:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2344 states have (on average 1.83660409556314) internal successors, (4305), 2346 states have internal predecessors, (4305), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 18:52:58,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4347 transitions. [2021-11-13 18:52:58,976 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4347 transitions. Word has length 123 [2021-11-13 18:52:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:52:58,977 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4347 transitions. [2021-11-13 18:52:58,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:52:58,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4347 transitions. [2021-11-13 18:52:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:52:58,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:52:58,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:52:58,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:52:58,988 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:52:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:52:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 796600300, now seen corresponding path program 1 times [2021-11-13 18:52:58,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:52:58,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274095918] [2021-11-13 18:52:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:52:58,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:52:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:52:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:52:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:52:59,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:52:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:52:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:52:59,275 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 18:52:59,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:52:59,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274095918] [2021-11-13 18:52:59,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274095918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:52:59,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:52:59,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:52:59,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578056184] [2021-11-13 18:52:59,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:52:59,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:52:59,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:52:59,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:52:59,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:52:59,281 INFO L87 Difference]: Start difference. First operand 2373 states and 4347 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:00,656 INFO L93 Difference]: Finished difference Result 2696 states and 4862 transitions. [2021-11-13 18:53:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:53:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:00,674 INFO L225 Difference]: With dead ends: 2696 [2021-11-13 18:53:00,674 INFO L226 Difference]: Without dead ends: 2459 [2021-11-13 18:53:00,677 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 18:53:00,678 INFO L933 BasicCegarLoop]: 4350 mSDtfsCounter, 4599 mSDsluCounter, 12313 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 874.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4614 SdHoareTripleChecker+Valid, 16663 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 106.45ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1026.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:00,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4614 Valid, 16663 Invalid, 897 Unknown, 0 Unchecked, 106.45ms Time], IncrementalHoareTripleChecker [56 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1026.97ms Time] [2021-11-13 18:53:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-11-13 18:53:00,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2373. [2021-11-13 18:53:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2344 states have (on average 1.8361774744027304) internal successors, (4304), 2346 states have internal predecessors, (4304), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 18:53:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4346 transitions. [2021-11-13 18:53:00,871 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4346 transitions. Word has length 123 [2021-11-13 18:53:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:00,872 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4346 transitions. [2021-11-13 18:53:00,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4346 transitions. [2021-11-13 18:53:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:00,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:00,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:00,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:53:00,875 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 915041774, now seen corresponding path program 1 times [2021-11-13 18:53:00,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:00,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148814395] [2021-11-13 18:53:00,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:00,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:00,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:00,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:00,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:01,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:01,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:01,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:01,048 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 18:53:01,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:01,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148814395] [2021-11-13 18:53:01,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148814395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:01,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:01,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:01,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454418644] [2021-11-13 18:53:01,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:01,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:01,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:01,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:01,051 INFO L87 Difference]: Start difference. First operand 2373 states and 4346 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:02,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:02,475 INFO L93 Difference]: Finished difference Result 2711 states and 4889 transitions. [2021-11-13 18:53:02,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:02,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:02,493 INFO L225 Difference]: With dead ends: 2711 [2021-11-13 18:53:02,493 INFO L226 Difference]: Without dead ends: 2474 [2021-11-13 18:53:02,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:02,497 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 4653 mSDsluCounter, 16445 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 892.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4668 SdHoareTripleChecker+Valid, 20818 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 77.70ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1065.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:02,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4668 Valid, 20818 Invalid, 1037 Unknown, 0 Unchecked, 77.70ms Time], IncrementalHoareTripleChecker [60 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 1065.49ms Time] [2021-11-13 18:53:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-11-13 18:53:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2373. [2021-11-13 18:53:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2344 states have (on average 1.8357508532423208) internal successors, (4303), 2346 states have internal predecessors, (4303), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 18:53:02,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4345 transitions. [2021-11-13 18:53:02,586 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4345 transitions. Word has length 123 [2021-11-13 18:53:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:02,587 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4345 transitions. [2021-11-13 18:53:02,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4345 transitions. [2021-11-13 18:53:02,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:02,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:02,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:02,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:53:02,590 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1990631508, now seen corresponding path program 1 times [2021-11-13 18:53:02,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:02,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698610915] [2021-11-13 18:53:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:02,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:02,725 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 18:53:02,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:02,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698610915] [2021-11-13 18:53:02,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698610915] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:02,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:02,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:02,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982819788] [2021-11-13 18:53:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:02,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:02,732 INFO L87 Difference]: Start difference. First operand 2373 states and 4345 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:03,916 INFO L93 Difference]: Finished difference Result 2694 states and 4856 transitions. [2021-11-13 18:53:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:53:03,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:03,934 INFO L225 Difference]: With dead ends: 2694 [2021-11-13 18:53:03,935 INFO L226 Difference]: Without dead ends: 2457 [2021-11-13 18:53:03,939 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 18:53:03,950 INFO L933 BasicCegarLoop]: 4340 mSDtfsCounter, 4754 mSDsluCounter, 12356 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 749.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4769 SdHoareTripleChecker+Valid, 16696 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.32ms SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 877.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:03,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4769 Valid, 16696 Invalid, 860 Unknown, 0 Unchecked, 53.32ms Time], IncrementalHoareTripleChecker [80 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 877.75ms Time] [2021-11-13 18:53:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-11-13 18:53:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2373. [2021-11-13 18:53:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2344 states have (on average 1.8344709897610922) internal successors, (4300), 2346 states have internal predecessors, (4300), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-13 18:53:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 4342 transitions. [2021-11-13 18:53:04,059 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 4342 transitions. Word has length 123 [2021-11-13 18:53:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:04,060 INFO L470 AbstractCegarLoop]: Abstraction has 2373 states and 4342 transitions. [2021-11-13 18:53:04,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 4342 transitions. [2021-11-13 18:53:04,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:04,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:04,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:04,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:53:04,074 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:04,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash 198555184, now seen corresponding path program 1 times [2021-11-13 18:53:04,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:04,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009237762] [2021-11-13 18:53:04,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:04,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:04,250 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 18:53:04,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:04,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009237762] [2021-11-13 18:53:04,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009237762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:04,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:04,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:53:04,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223220461] [2021-11-13 18:53:04,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:04,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:53:04,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:53:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:04,255 INFO L87 Difference]: Start difference. First operand 2373 states and 4342 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:06,791 INFO L93 Difference]: Finished difference Result 3039 states and 5393 transitions. [2021-11-13 18:53:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:53:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:06,810 INFO L225 Difference]: With dead ends: 3039 [2021-11-13 18:53:06,811 INFO L226 Difference]: Without dead ends: 2802 [2021-11-13 18:53:06,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:53:06,814 INFO L933 BasicCegarLoop]: 4595 mSDtfsCounter, 5195 mSDsluCounter, 17298 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1642.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5210 SdHoareTripleChecker+Valid, 21893 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 73.33ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1917.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:06,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5210 Valid, 21893 Invalid, 1889 Unknown, 0 Unchecked, 73.33ms Time], IncrementalHoareTripleChecker [90 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1917.84ms Time] [2021-11-13 18:53:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-11-13 18:53:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2620. [2021-11-13 18:53:06,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.8095052590572653) internal successors, (4645), 2570 states have internal predecessors, (4645), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4724 transitions. [2021-11-13 18:53:06,925 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4724 transitions. Word has length 123 [2021-11-13 18:53:06,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:06,926 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4724 transitions. [2021-11-13 18:53:06,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4724 transitions. [2021-11-13 18:53:06,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:06,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:06,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:06,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:53:06,930 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1668153490, now seen corresponding path program 1 times [2021-11-13 18:53:06,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:06,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215593667] [2021-11-13 18:53:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:06,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:06,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:07,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:07,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:07,051 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 18:53:07,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:07,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215593667] [2021-11-13 18:53:07,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215593667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:07,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:07,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:07,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203585711] [2021-11-13 18:53:07,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:07,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:07,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:07,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:07,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:07,054 INFO L87 Difference]: Start difference. First operand 2620 states and 4724 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:08,360 INFO L93 Difference]: Finished difference Result 3309 states and 5823 transitions. [2021-11-13 18:53:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:08,380 INFO L225 Difference]: With dead ends: 3309 [2021-11-13 18:53:08,380 INFO L226 Difference]: Without dead ends: 2825 [2021-11-13 18:53:08,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:08,385 INFO L933 BasicCegarLoop]: 4359 mSDtfsCounter, 4751 mSDsluCounter, 12355 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 825.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4766 SdHoareTripleChecker+Valid, 16714 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 57.71ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 975.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:08,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4766 Valid, 16714 Invalid, 911 Unknown, 0 Unchecked, 57.71ms Time], IncrementalHoareTripleChecker [85 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 975.95ms Time] [2021-11-13 18:53:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-11-13 18:53:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2620. [2021-11-13 18:53:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.8087261394624075) internal successors, (4643), 2570 states have internal predecessors, (4643), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4722 transitions. [2021-11-13 18:53:08,506 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4722 transitions. Word has length 123 [2021-11-13 18:53:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:08,506 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4722 transitions. [2021-11-13 18:53:08,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4722 transitions. [2021-11-13 18:53:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:08,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:08,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:08,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:53:08,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1319671408, now seen corresponding path program 1 times [2021-11-13 18:53:08,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:08,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604472506] [2021-11-13 18:53:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:08,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:08,653 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 18:53:08,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:08,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604472506] [2021-11-13 18:53:08,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604472506] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:08,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:08,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:08,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711759958] [2021-11-13 18:53:08,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:08,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:08,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:08,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:08,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:08,656 INFO L87 Difference]: Start difference. First operand 2620 states and 4722 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:09,797 INFO L93 Difference]: Finished difference Result 3305 states and 5810 transitions. [2021-11-13 18:53:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:09,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:09,816 INFO L225 Difference]: With dead ends: 3305 [2021-11-13 18:53:09,816 INFO L226 Difference]: Without dead ends: 2821 [2021-11-13 18:53:09,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:09,820 INFO L933 BasicCegarLoop]: 4353 mSDtfsCounter, 4752 mSDsluCounter, 12355 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 708.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4767 SdHoareTripleChecker+Valid, 16708 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.44ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 850.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:09,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4767 Valid, 16708 Invalid, 901 Unknown, 0 Unchecked, 43.44ms Time], IncrementalHoareTripleChecker [88 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 850.81ms Time] [2021-11-13 18:53:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-11-13 18:53:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2620. [2021-11-13 18:53:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.8079470198675496) internal successors, (4641), 2570 states have internal predecessors, (4641), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4720 transitions. [2021-11-13 18:53:09,987 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4720 transitions. Word has length 123 [2021-11-13 18:53:09,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:09,987 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4720 transitions. [2021-11-13 18:53:09,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:09,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4720 transitions. [2021-11-13 18:53:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:09,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:09,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:09,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:53:09,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1077799122, now seen corresponding path program 1 times [2021-11-13 18:53:09,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:09,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746968842] [2021-11-13 18:53:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:09,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:10,117 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 18:53:10,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746968842] [2021-11-13 18:53:10,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746968842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:10,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:10,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:10,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751620839] [2021-11-13 18:53:10,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:10,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:10,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:10,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:10,122 INFO L87 Difference]: Start difference. First operand 2620 states and 4720 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:11,336 INFO L93 Difference]: Finished difference Result 3299 states and 5793 transitions. [2021-11-13 18:53:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:11,356 INFO L225 Difference]: With dead ends: 3299 [2021-11-13 18:53:11,356 INFO L226 Difference]: Without dead ends: 2815 [2021-11-13 18:53:11,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:11,360 INFO L933 BasicCegarLoop]: 4347 mSDtfsCounter, 4748 mSDsluCounter, 12355 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 758.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4763 SdHoareTripleChecker+Valid, 16702 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.33ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 893.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:11,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4763 Valid, 16702 Invalid, 887 Unknown, 0 Unchecked, 42.33ms Time], IncrementalHoareTripleChecker [88 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 893.19ms Time] [2021-11-13 18:53:11,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2815 states. [2021-11-13 18:53:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2815 to 2620. [2021-11-13 18:53:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.807167900272692) internal successors, (4639), 2570 states have internal predecessors, (4639), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4718 transitions. [2021-11-13 18:53:11,488 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4718 transitions. Word has length 123 [2021-11-13 18:53:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:11,489 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4718 transitions. [2021-11-13 18:53:11,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4718 transitions. [2021-11-13 18:53:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:11,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:11,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:11,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:53:11,493 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:11,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1310764908, now seen corresponding path program 1 times [2021-11-13 18:53:11,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:11,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465216834] [2021-11-13 18:53:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:11,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:11,636 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 18:53:11,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:11,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465216834] [2021-11-13 18:53:11,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465216834] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:11,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:11,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:11,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928022473] [2021-11-13 18:53:11,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:11,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:11,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:11,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:11,640 INFO L87 Difference]: Start difference. First operand 2620 states and 4718 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:12,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:12,809 INFO L93 Difference]: Finished difference Result 3296 states and 5781 transitions. [2021-11-13 18:53:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:12,829 INFO L225 Difference]: With dead ends: 3296 [2021-11-13 18:53:12,830 INFO L226 Difference]: Without dead ends: 2812 [2021-11-13 18:53:12,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:12,834 INFO L933 BasicCegarLoop]: 4343 mSDtfsCounter, 4744 mSDsluCounter, 12353 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 738.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4759 SdHoareTripleChecker+Valid, 16696 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.54ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 879.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:12,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4759 Valid, 16696 Invalid, 881 Unknown, 0 Unchecked, 36.54ms Time], IncrementalHoareTripleChecker [90 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 879.09ms Time] [2021-11-13 18:53:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2812 states. [2021-11-13 18:53:12,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2812 to 2620. [2021-11-13 18:53:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.806388780677834) internal successors, (4637), 2570 states have internal predecessors, (4637), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4716 transitions. [2021-11-13 18:53:12,953 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4716 transitions. Word has length 123 [2021-11-13 18:53:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:12,954 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4716 transitions. [2021-11-13 18:53:12,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4716 transitions. [2021-11-13 18:53:12,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:12,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:12,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:12,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:53:12,958 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:12,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1383131282, now seen corresponding path program 1 times [2021-11-13 18:53:12,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:12,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82668423] [2021-11-13 18:53:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:12,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:12,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:13,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:13,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:13,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:13,085 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 18:53:13,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:13,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82668423] [2021-11-13 18:53:13,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82668423] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:13,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:13,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:13,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686514443] [2021-11-13 18:53:13,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:13,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:13,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:13,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:13,088 INFO L87 Difference]: Start difference. First operand 2620 states and 4716 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:14,213 INFO L93 Difference]: Finished difference Result 3293 states and 5769 transitions. [2021-11-13 18:53:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:14,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:14,230 INFO L225 Difference]: With dead ends: 3293 [2021-11-13 18:53:14,230 INFO L226 Difference]: Without dead ends: 2809 [2021-11-13 18:53:14,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:14,234 INFO L933 BasicCegarLoop]: 4339 mSDtfsCounter, 4742 mSDsluCounter, 12353 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 701.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4757 SdHoareTripleChecker+Valid, 16692 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 38.38ms SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 828.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:14,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4757 Valid, 16692 Invalid, 871 Unknown, 0 Unchecked, 38.38ms Time], IncrementalHoareTripleChecker [90 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 828.10ms Time] [2021-11-13 18:53:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-13 18:53:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2620. [2021-11-13 18:53:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2620 states, 2567 states have (on average 1.8056096610829762) internal successors, (4635), 2570 states have internal predecessors, (4635), 38 states have call successors, (38), 12 states have call predecessors, (38), 13 states have return successors, (41), 39 states have call predecessors, (41), 38 states have call successors, (41) [2021-11-13 18:53:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 4714 transitions. [2021-11-13 18:53:14,355 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 4714 transitions. Word has length 123 [2021-11-13 18:53:14,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:14,356 INFO L470 AbstractCegarLoop]: Abstraction has 2620 states and 4714 transitions. [2021-11-13 18:53:14,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 4714 transitions. [2021-11-13 18:53:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:14,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:14,359 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:14,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:53:14,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1855104812, now seen corresponding path program 1 times [2021-11-13 18:53:14,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:14,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28248078] [2021-11-13 18:53:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:14,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:14,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:14,504 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 18:53:14,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:14,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28248078] [2021-11-13 18:53:14,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28248078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:14,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:14,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:53:14,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913066762] [2021-11-13 18:53:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:14,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:53:14,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:53:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:14,507 INFO L87 Difference]: Start difference. First operand 2620 states and 4714 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:16,898 INFO L93 Difference]: Finished difference Result 4115 states and 7036 transitions. [2021-11-13 18:53:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:53:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:16,915 INFO L225 Difference]: With dead ends: 4115 [2021-11-13 18:53:16,915 INFO L226 Difference]: Without dead ends: 3631 [2021-11-13 18:53:16,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:53:16,920 INFO L933 BasicCegarLoop]: 4550 mSDtfsCounter, 5424 mSDsluCounter, 17283 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1473.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5448 SdHoareTripleChecker+Valid, 21833 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.04ms SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1734.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:16,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5448 Valid, 21833 Invalid, 1765 Unknown, 0 Unchecked, 61.04ms Time], IncrementalHoareTripleChecker [102 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1734.37ms Time] [2021-11-13 18:53:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-11-13 18:53:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3115. [2021-11-13 18:53:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3014 states have (on average 1.7644326476443264) internal successors, (5318), 3021 states have internal predecessors, (5318), 70 states have call successors, (70), 24 states have call predecessors, (70), 29 states have return successors, (85), 73 states have call predecessors, (85), 70 states have call successors, (85) [2021-11-13 18:53:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 5473 transitions. [2021-11-13 18:53:17,072 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 5473 transitions. Word has length 123 [2021-11-13 18:53:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:17,073 INFO L470 AbstractCegarLoop]: Abstraction has 3115 states and 5473 transitions. [2021-11-13 18:53:17,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 5473 transitions. [2021-11-13 18:53:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:17,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:17,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:17,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:53:17,077 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1088477266, now seen corresponding path program 1 times [2021-11-13 18:53:17,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:17,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026872495] [2021-11-13 18:53:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:17,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:17,213 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 18:53:17,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:17,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026872495] [2021-11-13 18:53:17,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026872495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:17,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:17,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:53:17,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452840494] [2021-11-13 18:53:17,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:17,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:53:17,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:53:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:17,216 INFO L87 Difference]: Start difference. First operand 3115 states and 5473 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:19,726 INFO L93 Difference]: Finished difference Result 6081 states and 10099 transitions. [2021-11-13 18:53:19,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:53:19,727 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:19,745 INFO L225 Difference]: With dead ends: 6081 [2021-11-13 18:53:19,746 INFO L226 Difference]: Without dead ends: 5102 [2021-11-13 18:53:19,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:53:19,752 INFO L933 BasicCegarLoop]: 4546 mSDtfsCounter, 5128 mSDsluCounter, 21482 mSDsCounter, 0 mSdLazyCounter, 1832 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1544.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5152 SdHoareTripleChecker+Valid, 26028 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.28ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1797.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:19,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5152 Valid, 26028 Invalid, 1911 Unknown, 0 Unchecked, 69.28ms Time], IncrementalHoareTripleChecker [79 Valid, 1832 Invalid, 0 Unknown, 0 Unchecked, 1797.04ms Time] [2021-11-13 18:53:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2021-11-13 18:53:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 4132. [2021-11-13 18:53:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 3931 states have (on average 1.711015008903587) internal successors, (6726), 3952 states have internal predecessors, (6726), 132 states have call successors, (132), 48 states have call predecessors, (132), 67 states have return successors, (195), 139 states have call predecessors, (195), 132 states have call successors, (195) [2021-11-13 18:53:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 7053 transitions. [2021-11-13 18:53:19,994 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 7053 transitions. Word has length 123 [2021-11-13 18:53:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:19,994 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 7053 transitions. [2021-11-13 18:53:19,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 6 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 7053 transitions. [2021-11-13 18:53:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:19,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:19,998 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:53:19,999 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1587515116, now seen corresponding path program 1 times [2021-11-13 18:53:20,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:20,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331424288] [2021-11-13 18:53:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:20,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:20,107 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 18:53:20,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:20,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331424288] [2021-11-13 18:53:20,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331424288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:20,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:20,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:20,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620932306] [2021-11-13 18:53:20,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:20,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:20,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:20,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:20,110 INFO L87 Difference]: Start difference. First operand 4132 states and 7053 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:21,406 INFO L93 Difference]: Finished difference Result 6923 states and 11445 transitions. [2021-11-13 18:53:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:21,422 INFO L225 Difference]: With dead ends: 6923 [2021-11-13 18:53:21,423 INFO L226 Difference]: Without dead ends: 4927 [2021-11-13 18:53:21,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:21,430 INFO L933 BasicCegarLoop]: 4329 mSDtfsCounter, 4637 mSDsluCounter, 16440 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 719.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4652 SdHoareTripleChecker+Valid, 20769 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.23ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 851.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:21,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4652 Valid, 20769 Invalid, 925 Unknown, 0 Unchecked, 49.23ms Time], IncrementalHoareTripleChecker [69 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 851.40ms Time] [2021-11-13 18:53:21,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-11-13 18:53:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 4132. [2021-11-13 18:53:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 3931 states have (on average 1.7089799033324853) internal successors, (6718), 3952 states have internal predecessors, (6718), 132 states have call successors, (132), 48 states have call predecessors, (132), 67 states have return successors, (195), 139 states have call predecessors, (195), 132 states have call successors, (195) [2021-11-13 18:53:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 7045 transitions. [2021-11-13 18:53:21,661 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 7045 transitions. Word has length 123 [2021-11-13 18:53:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:21,661 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 7045 transitions. [2021-11-13 18:53:21,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 7045 transitions. [2021-11-13 18:53:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:21,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:21,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:21,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:53:21,666 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:21,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:21,667 INFO L85 PathProgramCache]: Analyzing trace with hash 704006126, now seen corresponding path program 1 times [2021-11-13 18:53:21,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:21,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094202456] [2021-11-13 18:53:21,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:21,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:21,769 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 18:53:21,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:21,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094202456] [2021-11-13 18:53:21,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094202456] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:21,770 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:21,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:21,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993606296] [2021-11-13 18:53:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:21,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:21,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:21,772 INFO L87 Difference]: Start difference. First operand 4132 states and 7045 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:22,755 INFO L93 Difference]: Finished difference Result 6896 states and 11367 transitions. [2021-11-13 18:53:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:22,770 INFO L225 Difference]: With dead ends: 6896 [2021-11-13 18:53:22,771 INFO L226 Difference]: Without dead ends: 4900 [2021-11-13 18:53:22,778 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 18:53:22,779 INFO L933 BasicCegarLoop]: 4323 mSDtfsCounter, 4743 mSDsluCounter, 12353 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 539.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 16676 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.53ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 640.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4758 Valid, 16676 Invalid, 841 Unknown, 0 Unchecked, 28.53ms Time], IncrementalHoareTripleChecker [93 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 640.89ms Time] [2021-11-13 18:53:22,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4900 states. [2021-11-13 18:53:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4900 to 4132. [2021-11-13 18:53:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 3931 states have (on average 1.7069447977613839) internal successors, (6710), 3952 states have internal predecessors, (6710), 132 states have call successors, (132), 48 states have call predecessors, (132), 67 states have return successors, (195), 139 states have call predecessors, (195), 132 states have call successors, (195) [2021-11-13 18:53:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 7037 transitions. [2021-11-13 18:53:23,013 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 7037 transitions. Word has length 123 [2021-11-13 18:53:23,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:23,015 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 7037 transitions. [2021-11-13 18:53:23,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 7037 transitions. [2021-11-13 18:53:23,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:23,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:23,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:23,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:53:23,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:23,022 INFO L85 PathProgramCache]: Analyzing trace with hash 675505836, now seen corresponding path program 1 times [2021-11-13 18:53:23,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:23,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354313091] [2021-11-13 18:53:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:23,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:23,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:23,158 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 18:53:23,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:23,159 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354313091] [2021-11-13 18:53:23,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354313091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:23,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:23,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:53:23,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596105968] [2021-11-13 18:53:23,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:23,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:53:23,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:23,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:53:23,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:53:23,161 INFO L87 Difference]: Start difference. First operand 4132 states and 7037 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:24,493 INFO L93 Difference]: Finished difference Result 6842 states and 11235 transitions. [2021-11-13 18:53:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:53:24,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:24,508 INFO L225 Difference]: With dead ends: 6842 [2021-11-13 18:53:24,509 INFO L226 Difference]: Without dead ends: 4846 [2021-11-13 18:53:24,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:53:24,517 INFO L933 BasicCegarLoop]: 4318 mSDtfsCounter, 4634 mSDsluCounter, 16440 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 745.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4649 SdHoareTripleChecker+Valid, 20758 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.77ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 862.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:24,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4649 Valid, 20758 Invalid, 890 Unknown, 0 Unchecked, 48.77ms Time], IncrementalHoareTripleChecker [70 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 862.76ms Time] [2021-11-13 18:53:24,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4846 states. [2021-11-13 18:53:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4846 to 4132. [2021-11-13 18:53:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4132 states, 3931 states have (on average 1.7049096921902824) internal successors, (6702), 3952 states have internal predecessors, (6702), 132 states have call successors, (132), 48 states have call predecessors, (132), 67 states have return successors, (195), 139 states have call predecessors, (195), 132 states have call successors, (195) [2021-11-13 18:53:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 7029 transitions. [2021-11-13 18:53:24,807 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 7029 transitions. Word has length 123 [2021-11-13 18:53:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:24,807 INFO L470 AbstractCegarLoop]: Abstraction has 4132 states and 7029 transitions. [2021-11-13 18:53:24,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 7029 transitions. [2021-11-13 18:53:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 18:53:24,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:24,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:24,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:53:24,812 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1742398230, now seen corresponding path program 1 times [2021-11-13 18:53:24,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:24,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597740037] [2021-11-13 18:53:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:24,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:24,926 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 18:53:24,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:24,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597740037] [2021-11-13 18:53:24,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597740037] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:24,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:53:24,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:53:24,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089582667] [2021-11-13 18:53:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:24,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:53:24,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:24,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:53:24,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:53:24,931 INFO L87 Difference]: Start difference. First operand 4132 states and 7029 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:26,891 INFO L93 Difference]: Finished difference Result 9407 states and 15185 transitions. [2021-11-13 18:53:26,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:53:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-11-13 18:53:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:26,918 INFO L225 Difference]: With dead ends: 9407 [2021-11-13 18:53:26,918 INFO L226 Difference]: Without dead ends: 7412 [2021-11-13 18:53:26,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:53:26,930 INFO L933 BasicCegarLoop]: 4717 mSDtfsCounter, 5147 mSDsluCounter, 12692 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1126.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5181 SdHoareTripleChecker+Valid, 17409 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 50.82ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1324.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:26,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5181 Valid, 17409 Invalid, 1524 Unknown, 0 Unchecked, 50.82ms Time], IncrementalHoareTripleChecker [99 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 1324.24ms Time] [2021-11-13 18:53:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7412 states. [2021-11-13 18:53:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7412 to 6084. [2021-11-13 18:53:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6084 states, 5688 states have (on average 1.6415260196905765) internal successors, (9337), 5736 states have internal predecessors, (9337), 260 states have call successors, (260), 96 states have call predecessors, (260), 134 states have return successors, (379), 259 states have call predecessors, (379), 260 states have call successors, (379) [2021-11-13 18:53:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6084 states to 6084 states and 9976 transitions. [2021-11-13 18:53:27,378 INFO L78 Accepts]: Start accepts. Automaton has 6084 states and 9976 transitions. Word has length 123 [2021-11-13 18:53:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:27,379 INFO L470 AbstractCegarLoop]: Abstraction has 6084 states and 9976 transitions. [2021-11-13 18:53:27,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:53:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6084 states and 9976 transitions. [2021-11-13 18:53:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:53:27,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:27,393 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:27,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:53:27,394 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:27,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1362109035, now seen corresponding path program 1 times [2021-11-13 18:53:27,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:27,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840809562] [2021-11-13 18:53:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:27,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:53:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:53:27,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:53:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:53:27,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:27,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840809562] [2021-11-13 18:53:27,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840809562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:27,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127163970] [2021-11-13 18:53:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:27,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:27,589 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:27,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:53:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:27,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:27,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:53:28,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:28,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127163970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:28,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:53:28,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:53:28,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404586743] [2021-11-13 18:53:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:28,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:28,179 INFO L87 Difference]: Start difference. First operand 6084 states and 9976 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:29,003 INFO L93 Difference]: Finished difference Result 13897 states and 21984 transitions. [2021-11-13 18:53:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 200 [2021-11-13 18:53:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:29,037 INFO L225 Difference]: With dead ends: 13897 [2021-11-13 18:53:29,037 INFO L226 Difference]: Without dead ends: 9950 [2021-11-13 18:53:29,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:29,052 INFO L933 BasicCegarLoop]: 4346 mSDtfsCounter, 4244 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4244 SdHoareTripleChecker+Valid, 4687 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:29,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4244 Valid, 4687 Invalid, 12 Unknown, 0 Unchecked, 9.78ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 8.45ms Time] [2021-11-13 18:53:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9950 states. [2021-11-13 18:53:29,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9950 to 9916. [2021-11-13 18:53:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9146 states have (on average 1.5909687294992347) internal successors, (14551), 9240 states have internal predecessors, (14551), 500 states have call successors, (500), 192 states have call predecessors, (500), 268 states have return successors, (731), 491 states have call predecessors, (731), 500 states have call successors, (731) [2021-11-13 18:53:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 15782 transitions. [2021-11-13 18:53:29,869 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 15782 transitions. Word has length 200 [2021-11-13 18:53:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:29,870 INFO L470 AbstractCegarLoop]: Abstraction has 9916 states and 15782 transitions. [2021-11-13 18:53:29,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 2 states have internal predecessors, (170), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:29,870 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 15782 transitions. [2021-11-13 18:53:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:53:29,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:29,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:29,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:30,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:30,116 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:30,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:30,117 INFO L85 PathProgramCache]: Analyzing trace with hash 128011381, now seen corresponding path program 1 times [2021-11-13 18:53:30,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:30,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316774730] [2021-11-13 18:53:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:30,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:53:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:53:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:53:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:53:30,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:30,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316774730] [2021-11-13 18:53:30,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316774730] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:30,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294057780] [2021-11-13 18:53:30,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:30,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:30,292 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:53:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:30,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-13 18:53:30,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:30,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294057780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:30,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:53:30,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:53:30,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942757652] [2021-11-13 18:53:30,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:30,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:30,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:30,838 INFO L87 Difference]: Start difference. First operand 9916 states and 15782 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:32,146 INFO L93 Difference]: Finished difference Result 25313 states and 39418 transitions. [2021-11-13 18:53:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 200 [2021-11-13 18:53:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:32,216 INFO L225 Difference]: With dead ends: 25313 [2021-11-13 18:53:32,217 INFO L226 Difference]: Without dead ends: 17534 [2021-11-13 18:53:32,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:32,251 INFO L933 BasicCegarLoop]: 4346 mSDtfsCounter, 4256 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4256 SdHoareTripleChecker+Valid, 4687 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.01ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:32,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4256 Valid, 4687 Invalid, 12 Unknown, 0 Unchecked, 8.01ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 9.31ms Time] [2021-11-13 18:53:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17534 states. [2021-11-13 18:53:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17534 to 17468. [2021-11-13 18:53:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17468 states, 15966 states have (on average 1.555492922460228) internal successors, (24835), 16152 states have internal predecessors, (24835), 964 states have call successors, (964), 384 states have call predecessors, (964), 536 states have return successors, (1419), 939 states have call predecessors, (1419), 964 states have call successors, (1419) [2021-11-13 18:53:33,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17468 states to 17468 states and 27218 transitions. [2021-11-13 18:53:33,622 INFO L78 Accepts]: Start accepts. Automaton has 17468 states and 27218 transitions. Word has length 200 [2021-11-13 18:53:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:33,623 INFO L470 AbstractCegarLoop]: Abstraction has 17468 states and 27218 transitions. [2021-11-13 18:53:33,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 2 states have internal predecessors, (158), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:33,623 INFO L276 IsEmpty]: Start isEmpty. Operand 17468 states and 27218 transitions. [2021-11-13 18:53:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:53:33,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:33,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:33,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:33,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:53:33,880 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:33,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1369216171, now seen corresponding path program 1 times [2021-11-13 18:53:33,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:33,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504097142] [2021-11-13 18:53:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:33,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:53:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:53:34,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:53:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:53:34,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:34,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504097142] [2021-11-13 18:53:34,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504097142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481205134] [2021-11-13 18:53:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:34,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:34,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:34,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:53:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:34,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:53:34,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:34,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481205134] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:34,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:53:34,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:53:34,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484368051] [2021-11-13 18:53:34,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:34,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:34,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:34,591 INFO L87 Difference]: Start difference. First operand 17468 states and 27218 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:36,630 INFO L93 Difference]: Finished difference Result 47905 states and 73902 transitions. [2021-11-13 18:53:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 200 [2021-11-13 18:53:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:36,750 INFO L225 Difference]: With dead ends: 47905 [2021-11-13 18:53:36,750 INFO L226 Difference]: Without dead ends: 32574 [2021-11-13 18:53:36,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:36,805 INFO L933 BasicCegarLoop]: 4346 mSDtfsCounter, 4274 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4274 SdHoareTripleChecker+Valid, 4687 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.81ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:36,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4274 Valid, 4687 Invalid, 12 Unknown, 0 Unchecked, 7.81ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 13.21ms Time] [2021-11-13 18:53:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32574 states. [2021-11-13 18:53:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32574 to 32444. [2021-11-13 18:53:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32444 states, 29478 states have (on average 1.5326345070900333) internal successors, (45179), 29848 states have internal predecessors, (45179), 1892 states have call successors, (1892), 768 states have call predecessors, (1892), 1072 states have return successors, (2795), 1835 states have call predecessors, (2795), 1892 states have call successors, (2795) [2021-11-13 18:53:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32444 states to 32444 states and 49866 transitions. [2021-11-13 18:53:39,425 INFO L78 Accepts]: Start accepts. Automaton has 32444 states and 49866 transitions. Word has length 200 [2021-11-13 18:53:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:39,426 INFO L470 AbstractCegarLoop]: Abstraction has 32444 states and 49866 transitions. [2021-11-13 18:53:39,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 2 states have internal predecessors, (140), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 32444 states and 49866 transitions. [2021-11-13 18:53:39,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:53:39,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:39,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:39,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:39,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:39,696 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:39,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash -718302667, now seen corresponding path program 1 times [2021-11-13 18:53:39,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:39,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620137890] [2021-11-13 18:53:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:39,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:39,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:53:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:53:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:53:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:53:39,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620137890] [2021-11-13 18:53:39,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620137890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14225717] [2021-11-13 18:53:39,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:39,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:39,868 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:39,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:53:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:40,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:53:40,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:40,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14225717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:40,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:53:40,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:53:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646363190] [2021-11-13 18:53:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:40,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:40,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:40,363 INFO L87 Difference]: Start difference. First operand 32444 states and 49866 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:44,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:44,700 INFO L93 Difference]: Finished difference Result 92417 states and 141718 transitions. [2021-11-13 18:53:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:44,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 200 [2021-11-13 18:53:44,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:53:44,925 INFO L225 Difference]: With dead ends: 92417 [2021-11-13 18:53:44,925 INFO L226 Difference]: Without dead ends: 62110 [2021-11-13 18:53:45,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:45,018 INFO L933 BasicCegarLoop]: 4346 mSDtfsCounter, 4268 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 4687 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.17ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:53:45,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 4687 Invalid, 12 Unknown, 0 Unchecked, 8.17ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 17.91ms Time] [2021-11-13 18:53:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62110 states. [2021-11-13 18:53:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62110 to 61852. [2021-11-13 18:53:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61852 states, 56054 states have (on average 1.5204445713062404) internal successors, (85227), 56792 states have internal predecessors, (85227), 3652 states have call successors, (3652), 1536 states have call predecessors, (3652), 2144 states have return successors, (5451), 3531 states have call predecessors, (5451), 3652 states have call successors, (5451) [2021-11-13 18:53:50,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61852 states to 61852 states and 94330 transitions. [2021-11-13 18:53:50,056 INFO L78 Accepts]: Start accepts. Automaton has 61852 states and 94330 transitions. Word has length 200 [2021-11-13 18:53:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:53:50,056 INFO L470 AbstractCegarLoop]: Abstraction has 61852 states and 94330 transitions. [2021-11-13 18:53:50,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:53:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 61852 states and 94330 transitions. [2021-11-13 18:53:50,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-13 18:53:50,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:53:50,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:53:50,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:53:50,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-13 18:53:50,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:53:50,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:53:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1985634581, now seen corresponding path program 1 times [2021-11-13 18:53:50,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:53:50,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097656281] [2021-11-13 18:53:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:50,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:53:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:53:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:53:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:53:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:53:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:53:50,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:53:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:53:50,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:53:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-13 18:53:50,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:53:50,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097656281] [2021-11-13 18:53:50,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097656281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:53:50,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036869129] [2021-11-13 18:53:50,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:53:50,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:53:50,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:53:50,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:53:50,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:53:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:53:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:53:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:53:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:53:51,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:53:51,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036869129] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:53:51,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:53:51,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-13 18:53:51,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774248540] [2021-11-13 18:53:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:53:51,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:53:51,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:53:51,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:53:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:53:51,107 INFO L87 Difference]: Start difference. First operand 61852 states and 94330 transitions. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:53:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:53:59,885 INFO L93 Difference]: Finished difference Result 179497 states and 275095 transitions. [2021-11-13 18:53:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:53:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 200 [2021-11-13 18:53:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:54:00,601 INFO L225 Difference]: With dead ends: 179497 [2021-11-13 18:54:00,602 INFO L226 Difference]: Without dead ends: 119783 [2021-11-13 18:54:00,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:54:00,716 INFO L933 BasicCegarLoop]: 4683 mSDtfsCounter, 340 mSDsluCounter, 4334 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 9017 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.11ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:54:00,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 9017 Invalid, 13 Unknown, 0 Unchecked, 9.11ms Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 12.84ms Time] [2021-11-13 18:54:00,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119783 states. [2021-11-13 18:54:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119783 to 119783. [2021-11-13 18:54:10,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119783 states, 108446 states have (on average 1.5116186857975398) internal successors, (163929), 109793 states have internal predecessors, (163929), 7047 states have call successors, (7047), 3072 states have call predecessors, (7047), 4288 states have return successors, (12502), 6933 states have call predecessors, (12502), 7047 states have call successors, (12502) [2021-11-13 18:54:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119783 states to 119783 states and 183478 transitions. [2021-11-13 18:54:10,987 INFO L78 Accepts]: Start accepts. Automaton has 119783 states and 183478 transitions. Word has length 200 [2021-11-13 18:54:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:54:10,988 INFO L470 AbstractCegarLoop]: Abstraction has 119783 states and 183478 transitions. [2021-11-13 18:54:10,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:54:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 119783 states and 183478 transitions. [2021-11-13 18:54:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-13 18:54:11,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:54:11,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 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 18:54:11,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:54:11,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:11,508 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:54:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:54:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1980380111, now seen corresponding path program 1 times [2021-11-13 18:54:11,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:54:11,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973240891] [2021-11-13 18:54:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:11,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:54:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-13 18:54:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:54:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:54:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:54:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:54:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:54:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:54:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-11-13 18:54:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:54:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2021-11-13 18:54:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 18:54:11,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:54:11,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973240891] [2021-11-13 18:54:11,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973240891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:54:11,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673830372] [2021-11-13 18:54:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:54:11,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:54:11,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:54:11,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:54:11,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45529342-fc6b-4078-8244-3b8bd0f4f85d/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:54:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:54:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:54:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:54:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:54:12,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:54:12,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673830372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:54:12,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:54:12,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-13 18:54:12,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967586762] [2021-11-13 18:54:12,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:54:12,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:54:12,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:54:12,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:54:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:54:12,546 INFO L87 Difference]: Start difference. First operand 119783 states and 183478 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)