./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/functions_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY --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 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:13:41,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:13:41,866 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:13:41,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:13:41,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:13:41,926 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:13:41,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:13:41,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:13:41,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:13:41,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:13:41,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:13:41,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:13:41,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:13:41,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:13:41,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:13:41,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:13:41,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:13:41,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:13:41,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:13:41,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:13:41,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:13:41,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:13:41,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:13:41,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:13:41,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:13:41,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:13:41,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:13:41,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:13:41,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:13:41,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:13:41,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:13:41,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:13:41,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:13:41,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:13:41,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:13:41,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:13:41,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:13:41,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:13:41,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:13:41,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:13:41,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:13:41,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:13:42,001 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:13:42,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:13:42,002 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:13:42,002 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:13:42,003 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:13:42,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:13:42,004 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:13:42,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:13:42,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:13:42,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:13:42,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:13:42,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:13:42,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:13:42,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:13:42,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:13:42,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:13:42,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:13:42,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:13:42,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:13:42,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:13:42,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:13:42,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:13:42,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:13:42,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:13:42,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:13:42,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:13:42,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:13:42,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:13:42,013 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:13:42,014 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:13:42,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:13:42,014 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:13:42,014 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_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c699f32b26271d9b8672d2685c3f1aa3d3ad54df32baf7d1d77d9a96ddd2517 [2021-11-07 08:13:42,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:13:42,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:13:42,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:13:42,333 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:13:42,334 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:13:42,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-07 08:13:42,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/data/cd4692e39/05820c170de64f36bd042adbc0c00394/FLAG2732b9a9b [2021-11-07 08:13:42,845 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:13:42,846 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/sv-benchmarks/c/loop-acceleration/functions_1-2.c [2021-11-07 08:13:42,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/data/cd4692e39/05820c170de64f36bd042adbc0c00394/FLAG2732b9a9b [2021-11-07 08:13:43,236 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/data/cd4692e39/05820c170de64f36bd042adbc0c00394 [2021-11-07 08:13:43,238 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:13:43,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:13:43,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:13:43,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:13:43,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:13:43,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be3112f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43, skipping insertion in model container [2021-11-07 08:13:43,247 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:13:43,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:13:43,413 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_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-07 08:13:43,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:13:43,453 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:13:43,464 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_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/sv-benchmarks/c/loop-acceleration/functions_1-2.c[325,338] [2021-11-07 08:13:43,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:13:43,480 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:13:43,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43 WrapperNode [2021-11-07 08:13:43,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:13:43,482 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:13:43,482 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:13:43,482 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:13:43,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,513 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:13:43,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:13:43,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:13:43,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:13:43,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,522 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:13:43,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:13:43,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:13:43,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:13:43,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (1/1) ... [2021-11-07 08:13:43,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:13:43,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:43,582 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:13:43,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:13:43,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:13:43,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:13:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:13:43,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:13:43,868 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:13:43,869 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-07 08:13:43,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:43 BoogieIcfgContainer [2021-11-07 08:13:43,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:13:43,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:13:43,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:13:43,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:13:43,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:13:43" (1/3) ... [2021-11-07 08:13:43,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fddf6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:43, skipping insertion in model container [2021-11-07 08:13:43,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:13:43" (2/3) ... [2021-11-07 08:13:43,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fddf6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:13:43, skipping insertion in model container [2021-11-07 08:13:43,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:13:43" (3/3) ... [2021-11-07 08:13:43,883 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-2.c [2021-11-07 08:13:43,893 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:13:43,894 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:13:43,956 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:13:43,965 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:13:43,966 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:13:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 08:13:43,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:43,989 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 08:13:43,990 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:43,998 INFO L85 PathProgramCache]: Analyzing trace with hash 889635821, now seen corresponding path program 1 times [2021-11-07 08:13:44,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:44,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835389083] [2021-11-07 08:13:44,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:44,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:44,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:44,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835389083] [2021-11-07 08:13:44,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835389083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:13:44,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:13:44,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:13:44,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610412075] [2021-11-07 08:13:44,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:13:44,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:13:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:44,229 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:44,256 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-11-07 08:13:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:13:44,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-07 08:13:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:44,267 INFO L225 Difference]: With dead ends: 20 [2021-11-07 08:13:44,267 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 08:13:44,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:13:44,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 08:13:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-07 08:13:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 08:13:44,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-07 08:13:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:44,324 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 08:13:44,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 08:13:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:13:44,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:44,326 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:44,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:13:44,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:44,328 INFO L85 PathProgramCache]: Analyzing trace with hash 294764431, now seen corresponding path program 1 times [2021-11-07 08:13:44,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:44,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513341826] [2021-11-07 08:13:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:44,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:44,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:44,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513341826] [2021-11-07 08:13:44,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513341826] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:44,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082231824] [2021-11-07 08:13:44,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:44,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:44,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:44,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:13:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:44,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:13:44,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082231824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:44,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:44,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 08:13:44,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000366023] [2021-11-07 08:13:44,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:13:44,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:44,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:13:44,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:13:44,717 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:44,786 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-07 08:13:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:13:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 08:13:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:44,787 INFO L225 Difference]: With dead ends: 16 [2021-11-07 08:13:44,788 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 08:13:44,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 08:13:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-07 08:13:44,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-07 08:13:44,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-11-07 08:13:44,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:44,793 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-07 08:13:44,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:44,793 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-07 08:13:44,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:13:44,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:44,794 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:44,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:45,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:45,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -145990991, now seen corresponding path program 2 times [2021-11-07 08:13:45,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:45,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755103183] [2021-11-07 08:13:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:45,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:45,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:45,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755103183] [2021-11-07 08:13:45,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755103183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:45,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212955136] [2021-11-07 08:13:45,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:45,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:45,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:45,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:45,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:13:45,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:13:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:45,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212955136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:45,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:45,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 08:13:45,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371669353] [2021-11-07 08:13:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:13:45,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:13:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:13:45,466 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:45,538 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-07 08:13:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:13:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-07 08:13:45,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:45,539 INFO L225 Difference]: With dead ends: 18 [2021-11-07 08:13:45,540 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 08:13:45,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:13:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 08:13:45,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 08:13:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-07 08:13:45,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-11-07 08:13:45,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:45,545 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-07 08:13:45,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:45,545 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-07 08:13:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 08:13:45,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:45,546 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:45,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:45,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:45,769 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:45,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:45,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1489810771, now seen corresponding path program 3 times [2021-11-07 08:13:45,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:45,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633049481] [2021-11-07 08:13:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:45,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:45,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:45,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633049481] [2021-11-07 08:13:45,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633049481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:45,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567557984] [2021-11-07 08:13:45,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:13:45,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:45,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:45,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:45,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:13:46,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:13:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:13:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:46,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567557984] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:46,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:46,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 08:13:46,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010345601] [2021-11-07 08:13:46,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:13:46,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:13:46,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:13:46,225 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:46,341 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-07 08:13:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:13:46,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-07 08:13:46,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:46,343 INFO L225 Difference]: With dead ends: 20 [2021-11-07 08:13:46,343 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 08:13:46,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:13:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 08:13:46,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-07 08:13:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 08:13:46,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-11-07 08:13:46,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:46,351 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 08:13:46,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 08:13:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 08:13:46,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:46,354 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:46,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:46,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:46,571 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1537273717, now seen corresponding path program 4 times [2021-11-07 08:13:46,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:46,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653485381] [2021-11-07 08:13:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:46,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:46,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:46,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653485381] [2021-11-07 08:13:46,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653485381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:46,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033719261] [2021-11-07 08:13:46,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:13:46,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:46,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:46,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:46,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:13:46,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:13:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:46,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 08:13:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:46,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033719261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:46,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:46,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 08:13:46,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283432372] [2021-11-07 08:13:46,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:13:46,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:46,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:13:46,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:13:46,977 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:47,135 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-07 08:13:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:13:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-07 08:13:47,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:47,136 INFO L225 Difference]: With dead ends: 22 [2021-11-07 08:13:47,136 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 08:13:47,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:13:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 08:13:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-07 08:13:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 08:13:47,140 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-11-07 08:13:47,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:47,140 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 08:13:47,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 08:13:47,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:13:47,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:47,141 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:47,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:47,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:47,342 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -95475433, now seen corresponding path program 5 times [2021-11-07 08:13:47,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:47,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849930254] [2021-11-07 08:13:47,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:47,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:47,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:47,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849930254] [2021-11-07 08:13:47,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849930254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:47,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665102706] [2021-11-07 08:13:47,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:13:47,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:47,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:47,602 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:47,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:13:47,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 08:13:47,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:47,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 08:13:47,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:47,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665102706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:47,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:47,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 08:13:47,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745229724] [2021-11-07 08:13:47,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:13:47,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:13:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:13:47,844 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:48,065 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-07 08:13:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:13:48,065 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-07 08:13:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:48,066 INFO L225 Difference]: With dead ends: 24 [2021-11-07 08:13:48,066 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 08:13:48,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:13:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 08:13:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-07 08:13:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-07 08:13:48,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-11-07 08:13:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:48,071 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-07 08:13:48,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:48,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-07 08:13:48,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 08:13:48,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:48,072 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:48,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-07 08:13:48,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:48,281 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1504345543, now seen corresponding path program 6 times [2021-11-07 08:13:48,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:48,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106480419] [2021-11-07 08:13:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:48,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:48,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:48,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106480419] [2021-11-07 08:13:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106480419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:48,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338337823] [2021-11-07 08:13:48,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:13:48,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:48,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:48,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:48,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:13:48,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:13:48,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:48,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 08:13:48,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:48,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338337823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:48,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:48,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 08:13:48,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455416072] [2021-11-07 08:13:48,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:13:48,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:48,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:13:48,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:13:48,860 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:49,130 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-07 08:13:49,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:13:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-07 08:13:49,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:49,132 INFO L225 Difference]: With dead ends: 26 [2021-11-07 08:13:49,132 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 08:13:49,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:13:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 08:13:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-07 08:13:49,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-07 08:13:49,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-11-07 08:13:49,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:49,137 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-07 08:13:49,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-07 08:13:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:13:49,138 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:49,139 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:49,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:49,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:49,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:49,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:49,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1781144283, now seen corresponding path program 7 times [2021-11-07 08:13:49,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:49,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283711711] [2021-11-07 08:13:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:49,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:49,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:49,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283711711] [2021-11-07 08:13:49,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283711711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:49,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810552742] [2021-11-07 08:13:49,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:13:49,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:49,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:49,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:49,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:13:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:49,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 08:13:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:49,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810552742] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:49,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:49,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 08:13:49,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284851950] [2021-11-07 08:13:49,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:13:49,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:49,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:13:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:13:49,911 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:50,243 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-07 08:13:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:13:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 08:13:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:50,245 INFO L225 Difference]: With dead ends: 28 [2021-11-07 08:13:50,245 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 08:13:50,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:13:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 08:13:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-07 08:13:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 08:13:50,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-11-07 08:13:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:50,253 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 08:13:50,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 08:13:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 08:13:50,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:50,255 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:50,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:50,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 08:13:50,473 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1959062787, now seen corresponding path program 8 times [2021-11-07 08:13:50,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:50,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127562132] [2021-11-07 08:13:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:50,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:50,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:50,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127562132] [2021-11-07 08:13:50,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127562132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:50,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838174226] [2021-11-07 08:13:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:50,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:50,817 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:50,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:13:50,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:50,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 08:13:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:51,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:51,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838174226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:51,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:51,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 08:13:51,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619283005] [2021-11-07 08:13:51,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:13:51,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:13:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:13:51,133 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:51,518 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 08:13:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:13:51,519 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 08:13:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:51,520 INFO L225 Difference]: With dead ends: 30 [2021-11-07 08:13:51,520 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 08:13:51,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:13:51,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 08:13:51,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-07 08:13:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-07 08:13:51,525 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-11-07 08:13:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:51,525 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-07 08:13:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-07 08:13:51,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:13:51,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:51,526 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:51,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:51,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:51,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:51,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1410430305, now seen corresponding path program 9 times [2021-11-07 08:13:51,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:51,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313534264] [2021-11-07 08:13:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:51,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:52,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313534264] [2021-11-07 08:13:52,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313534264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132685711] [2021-11-07 08:13:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:13:52,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:52,074 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:52,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:13:52,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:13:52,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:52,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 08:13:52,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:52,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132685711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:52,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:52,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 08:13:52,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021393880] [2021-11-07 08:13:52,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:13:52,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:13:52,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:13:52,533 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:53,010 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 08:13:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:13:53,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-07 08:13:53,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:53,012 INFO L225 Difference]: With dead ends: 32 [2021-11-07 08:13:53,012 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 08:13:53,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:13:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 08:13:53,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-07 08:13:53,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-07 08:13:53,020 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-11-07 08:13:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:53,021 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-07 08:13:53,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:53,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-07 08:13:53,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 08:13:53,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:53,023 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:53,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:53,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:13:53,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:53,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1839374785, now seen corresponding path program 10 times [2021-11-07 08:13:53,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:53,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949098618] [2021-11-07 08:13:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:53,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:53,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:53,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949098618] [2021-11-07 08:13:53,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949098618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:53,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684066480] [2021-11-07 08:13:53,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:13:53,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:53,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:53,665 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:53,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:13:53,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:13:53,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:53,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-07 08:13:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:54,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684066480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:54,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:54,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 08:13:54,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143051961] [2021-11-07 08:13:54,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:13:54,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:13:54,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:13:54,071 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:54,623 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-11-07 08:13:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:13:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 08:13:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:54,624 INFO L225 Difference]: With dead ends: 34 [2021-11-07 08:13:54,624 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:13:54,626 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:13:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:13:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-07 08:13:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 08:13:54,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-11-07 08:13:54,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:54,631 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 08:13:54,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 08:13:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:13:54,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:54,632 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:54,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:54,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:13:54,849 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:54,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1834125213, now seen corresponding path program 11 times [2021-11-07 08:13:54,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:54,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939262007] [2021-11-07 08:13:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:54,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:55,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:55,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939262007] [2021-11-07 08:13:55,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939262007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:55,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828314691] [2021-11-07 08:13:55,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:13:55,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:55,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:55,293 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:55,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:13:56,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 08:13:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:56,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-07 08:13:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:56,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828314691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:56,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:56,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 08:13:56,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400221416] [2021-11-07 08:13:56,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:13:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:13:56,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=589, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:13:56,650 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:57,294 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-11-07 08:13:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:13:57,295 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:13:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:57,295 INFO L225 Difference]: With dead ends: 36 [2021-11-07 08:13:57,295 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 08:13:57,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=2085, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:13:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 08:13:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-07 08:13:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 08:13:57,301 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-11-07 08:13:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:57,301 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 08:13:57,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 08:13:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:13:57,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:57,302 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:57,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:57,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:57,509 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:57,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1604505979, now seen corresponding path program 12 times [2021-11-07 08:13:57,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:57,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771385703] [2021-11-07 08:13:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:57,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:58,043 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:58,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:58,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771385703] [2021-11-07 08:13:58,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771385703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:58,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322091559] [2021-11-07 08:13:58,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:13:58,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:58,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:58,045 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:58,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:13:58,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:13:58,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:58,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 08:13:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:13:58,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322091559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:58,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:58,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 08:13:58,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58367376] [2021-11-07 08:13:58,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:13:58,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:13:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:13:58,676 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:59,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:59,395 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-07 08:13:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:13:59,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-07 08:13:59,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:59,396 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:13:59,396 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 08:13:59,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=2466, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:13:59,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 08:13:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-07 08:13:59,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:59,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-11-07 08:13:59,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-11-07 08:13:59,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:59,403 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-11-07 08:13:59,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:59,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-11-07 08:13:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 08:13:59,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:59,408 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:59,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:59,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:59,608 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:59,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash 16245799, now seen corresponding path program 13 times [2021-11-07 08:13:59,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:59,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038283486] [2021-11-07 08:13:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:59,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:00,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038283486] [2021-11-07 08:14:00,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038283486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:00,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518293737] [2021-11-07 08:14:00,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:00,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:00,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:00,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:00,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:14:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:00,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-07 08:14:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:00,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518293737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:00,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:00,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 08:14:00,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007322641] [2021-11-07 08:14:00,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:14:00,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:14:00,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:14:00,690 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:01,485 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-11-07 08:14:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:14:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-07 08:14:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:01,489 INFO L225 Difference]: With dead ends: 40 [2021-11-07 08:14:01,489 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 08:14:01,491 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:14:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 08:14:01,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-07 08:14:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-07 08:14:01,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-11-07 08:14:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:01,495 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-07 08:14:01,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-07 08:14:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 08:14:01,496 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:01,496 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:01,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:01,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:14:01,696 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1514423991, now seen corresponding path program 14 times [2021-11-07 08:14:01,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:01,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582282415] [2021-11-07 08:14:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:01,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:02,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:02,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582282415] [2021-11-07 08:14:02,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582282415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:02,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035124210] [2021-11-07 08:14:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:02,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:02,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:02,261 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:02,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:14:02,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:02,490 WARN L261 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-07 08:14:02,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:02,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035124210] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:02,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:02,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 08:14:02,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797807827] [2021-11-07 08:14:02,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:14:02,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:14:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:14:02,760 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:03,592 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-07 08:14:03,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:14:03,592 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 08:14:03,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:03,593 INFO L225 Difference]: With dead ends: 42 [2021-11-07 08:14:03,593 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 08:14:03,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=3324, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:14:03,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 08:14:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-07 08:14:03,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:03,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-07 08:14:03,599 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-11-07 08:14:03,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:03,600 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-07 08:14:03,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:03,600 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-07 08:14:03,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:14:03,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:03,601 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:03,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:03,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:14:03,820 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 685690347, now seen corresponding path program 15 times [2021-11-07 08:14:03,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:03,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854188181] [2021-11-07 08:14:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:03,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:04,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854188181] [2021-11-07 08:14:04,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854188181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:04,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922360671] [2021-11-07 08:14:04,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:04,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:04,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:04,468 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:04,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:14:05,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 08:14:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:05,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-07 08:14:05,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:05,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922360671] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:05,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:05,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 08:14:05,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041683989] [2021-11-07 08:14:05,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:14:05,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:14:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:14:05,348 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:06,295 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-11-07 08:14:06,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:14:06,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 08:14:06,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:06,296 INFO L225 Difference]: With dead ends: 44 [2021-11-07 08:14:06,296 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 08:14:06,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:14:06,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 08:14:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-07 08:14:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-11-07 08:14:06,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-11-07 08:14:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:06,303 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-11-07 08:14:06,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:06,304 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-11-07 08:14:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:14:06,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:06,304 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:06,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-07 08:14:06,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:14:06,509 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:06,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1871659533, now seen corresponding path program 16 times [2021-11-07 08:14:06,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:06,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334015750] [2021-11-07 08:14:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:06,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:07,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:07,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334015750] [2021-11-07 08:14:07,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334015750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35383478] [2021-11-07 08:14:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:07,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:07,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:07,198 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:07,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:14:07,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:07,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:07,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-07 08:14:07,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:07,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35383478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:07,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:07,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 08:14:07,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289594697] [2021-11-07 08:14:07,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 08:14:07,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 08:14:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1174, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 08:14:07,772 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:08,772 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-11-07 08:14:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:14:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-07 08:14:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:08,773 INFO L225 Difference]: With dead ends: 46 [2021-11-07 08:14:08,773 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 08:14:08,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=4310, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:14:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 08:14:08,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-07 08:14:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 08:14:08,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-11-07 08:14:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:08,780 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 08:14:08,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 08:14:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 08:14:08,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:08,781 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:08,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:08,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:14:08,993 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:08,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:08,994 INFO L85 PathProgramCache]: Analyzing trace with hash -873253457, now seen corresponding path program 17 times [2021-11-07 08:14:08,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:08,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787060413] [2021-11-07 08:14:08,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:08,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:09,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:09,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787060413] [2021-11-07 08:14:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787060413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:09,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145180858] [2021-11-07 08:14:09,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:09,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:09,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:09,848 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:09,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:14:13,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 08:14:13,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:13,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 139 conjunts are in the unsatisfiable core [2021-11-07 08:14:13,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:13,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145180858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:13,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:13,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 08:14:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969265249] [2021-11-07 08:14:13,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 08:14:13,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:13,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 08:14:13,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:14:13,674 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:14,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:14,822 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-07 08:14:14,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 08:14:14,823 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-07 08:14:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:14,823 INFO L225 Difference]: With dead ends: 48 [2021-11-07 08:14:14,823 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 08:14:14,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=4851, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 08:14:14,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 08:14:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-07 08:14:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 08:14:14,841 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-11-07 08:14:14,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:14,842 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 08:14:14,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:14,842 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 08:14:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 08:14:14,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:14,843 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:14,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:15,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:14:15,049 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:15,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:15,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1624717103, now seen corresponding path program 18 times [2021-11-07 08:14:15,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:15,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914860628] [2021-11-07 08:14:15,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:15,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:15,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:15,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914860628] [2021-11-07 08:14:15,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914860628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:15,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198575106] [2021-11-07 08:14:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:15,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:15,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:15,875 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:15,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:14:16,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 08:14:16,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:16,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 154 conjunts are in the unsatisfiable core [2021-11-07 08:14:16,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:16,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198575106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:16,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:16,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 08:14:16,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838460678] [2021-11-07 08:14:16,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:14:16,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:14:16,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1464, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:14:16,902 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:18,287 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-11-07 08:14:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:14:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 08:14:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:18,288 INFO L225 Difference]: With dead ends: 50 [2021-11-07 08:14:18,288 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 08:14:18,290 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=276, Invalid=5424, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:14:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 08:14:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-07 08:14:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 08:14:18,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-11-07 08:14:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:18,307 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 08:14:18,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 08:14:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:14:18,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:18,308 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:18,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:18,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:18,509 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:18,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2068192115, now seen corresponding path program 19 times [2021-11-07 08:14:18,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:18,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709351063] [2021-11-07 08:14:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:18,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:19,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:19,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709351063] [2021-11-07 08:14:19,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709351063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:19,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508649026] [2021-11-07 08:14:19,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:19,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:19,465 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:14:19,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:19,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-07 08:14:19,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:20,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508649026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:20,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:20,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 08:14:20,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571906478] [2021-11-07 08:14:20,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 08:14:20,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:20,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 08:14:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1621, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:14:20,200 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:21,606 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-11-07 08:14:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:14:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:14:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:21,607 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:14:21,607 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 08:14:21,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=6029, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 08:14:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 08:14:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-07 08:14:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:21,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-07 08:14:21,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-11-07 08:14:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:21,614 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-07 08:14:21,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:21,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-07 08:14:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 08:14:21,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:21,615 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:21,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:21,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:21,820 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:21,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:21,820 INFO L85 PathProgramCache]: Analyzing trace with hash -984003179, now seen corresponding path program 20 times [2021-11-07 08:14:21,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:21,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223526128] [2021-11-07 08:14:21,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:21,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:22,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:22,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223526128] [2021-11-07 08:14:22,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223526128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:22,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119520695] [2021-11-07 08:14:22,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:22,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:22,716 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:22,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:14:23,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:23,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:23,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 163 conjunts are in the unsatisfiable core [2021-11-07 08:14:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:23,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119520695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:23,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:23,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-07 08:14:23,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067167432] [2021-11-07 08:14:23,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:14:23,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:23,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:14:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:14:23,445 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:24,853 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 08:14:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:14:24,853 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 08:14:24,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:24,854 INFO L225 Difference]: With dead ends: 54 [2021-11-07 08:14:24,854 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:14:24,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=306, Invalid=6666, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:14:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:14:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-07 08:14:24,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 08:14:24,861 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-11-07 08:14:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:24,862 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 08:14:24,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 08:14:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 08:14:24,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:24,863 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:24,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:25,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:25,089 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:25,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:25,089 INFO L85 PathProgramCache]: Analyzing trace with hash -681017545, now seen corresponding path program 21 times [2021-11-07 08:14:25,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:25,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012284720] [2021-11-07 08:14:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:25,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:26,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:26,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012284720] [2021-11-07 08:14:26,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012284720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:26,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405847986] [2021-11-07 08:14:26,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:14:26,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:26,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:26,146 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:26,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:14:27,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 08:14:27,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:27,185 WARN L261 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 177 conjunts are in the unsatisfiable core [2021-11-07 08:14:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:27,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405847986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:27,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:27,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-07 08:14:27,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119819947] [2021-11-07 08:14:27,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:14:27,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:27,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:14:27,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:14:27,504 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:29,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:29,107 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-11-07 08:14:29,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:14:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 08:14:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:29,110 INFO L225 Difference]: With dead ends: 56 [2021-11-07 08:14:29,110 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 08:14:29,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=321, Invalid=7335, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 08:14:29,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 08:14:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-07 08:14:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-07 08:14:29,116 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-11-07 08:14:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:29,117 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-07 08:14:29,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:29,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-07 08:14:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 08:14:29,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:29,118 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:29,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:29,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:29,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1569599399, now seen corresponding path program 22 times [2021-11-07 08:14:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:29,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345820942] [2021-11-07 08:14:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:29,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:30,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:30,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345820942] [2021-11-07 08:14:30,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345820942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:30,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615487464] [2021-11-07 08:14:30,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:14:30,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:30,652 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:30,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:14:31,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:14:31,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:31,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 179 conjunts are in the unsatisfiable core [2021-11-07 08:14:31,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:31,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615487464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:31,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:31,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 08:14:31,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899254675] [2021-11-07 08:14:31,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:14:31,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:14:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2140, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:14:31,490 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:33,345 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-07 08:14:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:14:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 08:14:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:33,346 INFO L225 Difference]: With dead ends: 58 [2021-11-07 08:14:33,346 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 08:14:33,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:14:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 08:14:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-07 08:14:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-07 08:14:33,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-11-07 08:14:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:33,353 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-07 08:14:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-07 08:14:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:14:33,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:33,354 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:33,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:33,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:14:33,569 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -798269189, now seen corresponding path program 23 times [2021-11-07 08:14:33,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:33,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457526194] [2021-11-07 08:14:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:33,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:34,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:34,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457526194] [2021-11-07 08:14:34,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457526194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:34,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201638670] [2021-11-07 08:14:34,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:14:34,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:34,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:34,802 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:34,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:14:40,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 08:14:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:40,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 187 conjunts are in the unsatisfiable core [2021-11-07 08:14:40,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:40,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201638670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:40,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:40,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-07 08:14:40,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698939377] [2021-11-07 08:14:40,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 08:14:40,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:40,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 08:14:40,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:14:40,932 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:42,756 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-11-07 08:14:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 08:14:42,756 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:14:42,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:42,757 INFO L225 Difference]: With dead ends: 60 [2021-11-07 08:14:42,757 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 08:14:42,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=351, Invalid=8769, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:14:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 08:14:42,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-07 08:14:42,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-07 08:14:42,762 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-11-07 08:14:42,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:42,763 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-07 08:14:42,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:42,763 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-07 08:14:42,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 08:14:42,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:42,764 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:42,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:42,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:14:42,973 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:42,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1715687709, now seen corresponding path program 24 times [2021-11-07 08:14:42,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:42,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339299305] [2021-11-07 08:14:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:42,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:44,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:44,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339299305] [2021-11-07 08:14:44,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339299305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:44,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409457699] [2021-11-07 08:14:44,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:14:44,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:44,217 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:44,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:14:47,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 08:14:47,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:47,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 195 conjunts are in the unsatisfiable core [2021-11-07 08:14:47,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:47,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409457699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:47,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:47,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-07 08:14:47,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962539314] [2021-11-07 08:14:47,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:14:47,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:47,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:14:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2526, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:14:47,697 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:49,643 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 08:14:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:14:49,643 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 08:14:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:49,644 INFO L225 Difference]: With dead ends: 62 [2021-11-07 08:14:49,644 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 08:14:49,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=366, Invalid=9534, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:14:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 08:14:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-07 08:14:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-07 08:14:49,650 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-11-07 08:14:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:49,651 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-07 08:14:49,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-07 08:14:49,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:14:49,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:49,652 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:49,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:49,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:14:49,857 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:49,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash -438320961, now seen corresponding path program 25 times [2021-11-07 08:14:49,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:49,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765243985] [2021-11-07 08:14:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:49,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:49,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:51,124 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:51,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:51,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765243985] [2021-11-07 08:14:51,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765243985] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:51,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051540053] [2021-11-07 08:14:51,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:14:51,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:51,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:51,132 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:51,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:14:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:51,736 WARN L261 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 203 conjunts are in the unsatisfiable core [2021-11-07 08:14:51,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:52,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051540053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:52,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:52,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-07 08:14:52,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060186867] [2021-11-07 08:14:52,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 08:14:52,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 08:14:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:14:52,146 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:54,280 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-11-07 08:14:54,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:14:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-07 08:14:54,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:54,281 INFO L225 Difference]: With dead ends: 64 [2021-11-07 08:14:54,281 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 08:14:54,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=381, Invalid=10331, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 08:14:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 08:14:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-07 08:14:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-07 08:14:54,287 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-11-07 08:14:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:54,287 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-07 08:14:54,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-07 08:14:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:14:54,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:54,289 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:54,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:54,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:14:54,505 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash -266416159, now seen corresponding path program 26 times [2021-11-07 08:14:54,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:54,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26425806] [2021-11-07 08:14:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:54,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:14:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:55,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:14:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26425806] [2021-11-07 08:14:55,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26425806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:55,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787162223] [2021-11-07 08:14:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:14:55,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:55,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:14:55,876 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:14:55,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:14:56,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:14:56,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:14:56,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 211 conjunts are in the unsatisfiable core [2021-11-07 08:14:56,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:14:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:14:56,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787162223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:14:56,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:14:56,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-07 08:14:56,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855097493] [2021-11-07 08:14:56,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 08:14:56,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:14:56,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 08:14:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2944, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 08:14:56,895 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:14:59,196 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-07 08:14:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 08:14:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:14:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:14:59,197 INFO L225 Difference]: With dead ends: 66 [2021-11-07 08:14:59,197 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:14:59,198 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=396, Invalid=11160, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:14:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:14:59,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-07 08:14:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-11-07 08:14:59,215 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-11-07 08:14:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:14:59,215 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-11-07 08:14:59,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:14:59,215 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-11-07 08:14:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:14:59,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:14:59,216 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 08:14:59,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:14:59,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:14:59,435 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:14:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:14:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1725341315, now seen corresponding path program 27 times [2021-11-07 08:14:59,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:14:59,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719117899] [2021-11-07 08:14:59,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:14:59,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:14:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:01,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:01,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719117899] [2021-11-07 08:15:01,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719117899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:01,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050404533] [2021-11-07 08:15:01,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:15:01,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:01,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:01,076 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:01,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:15:02,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 08:15:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:02,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 225 conjunts are in the unsatisfiable core [2021-11-07 08:15:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:03,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050404533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:03,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:03,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-07 08:15:03,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504952804] [2021-11-07 08:15:03,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 08:15:03,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:03,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 08:15:03,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=3165, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:15:03,010 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:05,467 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-07 08:15:05,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 08:15:05,468 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:15:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:05,469 INFO L225 Difference]: With dead ends: 68 [2021-11-07 08:15:05,469 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 08:15:05,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=411, Invalid=12021, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:15:05,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 08:15:05,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-07 08:15:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-11-07 08:15:05,483 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-11-07 08:15:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:05,484 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-11-07 08:15:05,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-11-07 08:15:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 08:15:05,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:05,485 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:05,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:05,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:15:05,692 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:05,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:05,692 INFO L85 PathProgramCache]: Analyzing trace with hash 248859813, now seen corresponding path program 28 times [2021-11-07 08:15:05,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:05,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374090115] [2021-11-07 08:15:05,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:05,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374090115] [2021-11-07 08:15:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374090115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:07,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643182845] [2021-11-07 08:15:07,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:15:07,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:07,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:07,286 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:15:08,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:15:08,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:08,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 227 conjunts are in the unsatisfiable core [2021-11-07 08:15:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:08,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643182845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:08,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:08,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-07 08:15:08,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775973011] [2021-11-07 08:15:08,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 08:15:08,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:08,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 08:15:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3394, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 08:15:08,449 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:11,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:11,094 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-07 08:15:11,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:15:11,094 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 08:15:11,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:11,095 INFO L225 Difference]: With dead ends: 70 [2021-11-07 08:15:11,095 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 08:15:11,097 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=426, Invalid=12914, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 08:15:11,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 08:15:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-07 08:15:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-07 08:15:11,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-11-07 08:15:11,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:11,101 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-07 08:15:11,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-07 08:15:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:15:11,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:11,102 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:11,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-07 08:15:11,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:15:11,302 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:11,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:11,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1310655929, now seen corresponding path program 29 times [2021-11-07 08:15:11,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:11,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077328606] [2021-11-07 08:15:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:11,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:13,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:13,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077328606] [2021-11-07 08:15:13,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077328606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:13,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749984669] [2021-11-07 08:15:13,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:15:13,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:13,217 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:13,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:15:26,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 08:15:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:26,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 235 conjunts are in the unsatisfiable core [2021-11-07 08:15:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:26,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749984669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:26,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:26,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-07 08:15:26,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329868826] [2021-11-07 08:15:26,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 08:15:26,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 08:15:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3631, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:15:26,873 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:29,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:29,653 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-11-07 08:15:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 08:15:29,654 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 08:15:29,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:29,655 INFO L225 Difference]: With dead ends: 72 [2021-11-07 08:15:29,655 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 08:15:29,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1655 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=441, Invalid=13839, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 08:15:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 08:15:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-07 08:15:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-07 08:15:29,661 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-11-07 08:15:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:29,661 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-07 08:15:29,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-07 08:15:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 08:15:29,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:29,662 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:29,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:29,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:29,871 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1061697687, now seen corresponding path program 30 times [2021-11-07 08:15:29,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:29,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654965098] [2021-11-07 08:15:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:29,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:31,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654965098] [2021-11-07 08:15:31,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654965098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:31,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564924097] [2021-11-07 08:15:31,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:15:31,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:31,827 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:31,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:15:36,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 08:15:36,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:36,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 244 conjunts are in the unsatisfiable core [2021-11-07 08:15:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:36,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564924097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:36,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-07 08:15:36,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137669201] [2021-11-07 08:15:36,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 08:15:36,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 08:15:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=3876, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 08:15:36,621 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:39,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:39,573 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-07 08:15:39,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 08:15:39,573 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 08:15:39,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:39,574 INFO L225 Difference]: With dead ends: 74 [2021-11-07 08:15:39,574 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:15:39,576 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=456, Invalid=14796, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 08:15:39,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:15:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-07 08:15:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-07 08:15:39,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-11-07 08:15:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:39,581 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-07 08:15:39,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:39,581 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-07 08:15:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:15:39,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:39,582 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:39,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:39,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:39,793 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1963971595, now seen corresponding path program 31 times [2021-11-07 08:15:39,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:39,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325386586] [2021-11-07 08:15:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:39,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:39,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:41,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:41,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325386586] [2021-11-07 08:15:41,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325386586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:41,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378738432] [2021-11-07 08:15:41,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:15:41,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:41,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:41,729 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:41,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:15:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:42,643 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 251 conjunts are in the unsatisfiable core [2021-11-07 08:15:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:43,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378738432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:43,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:43,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-07 08:15:43,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438163711] [2021-11-07 08:15:43,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 08:15:43,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:43,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 08:15:43,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:15:43,082 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:46,265 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-07 08:15:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 08:15:46,266 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 08:15:46,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:46,266 INFO L225 Difference]: With dead ends: 76 [2021-11-07 08:15:46,266 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 08:15:46,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=471, Invalid=15785, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 08:15:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 08:15:46,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-07 08:15:46,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-07 08:15:46,272 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-11-07 08:15:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:46,272 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-07 08:15:46,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-07 08:15:46,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 08:15:46,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:46,274 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:46,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:46,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:15:46,487 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:46,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:46,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1939292205, now seen corresponding path program 32 times [2021-11-07 08:15:46,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:46,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110813976] [2021-11-07 08:15:46,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:46,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:48,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:48,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:48,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110813976] [2021-11-07 08:15:48,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110813976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:48,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102175814] [2021-11-07 08:15:48,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:15:48,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:48,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:48,726 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:48,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:15:49,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:15:49,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:49,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 259 conjunts are in the unsatisfiable core [2021-11-07 08:15:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:50,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102175814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:50,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:50,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-07 08:15:50,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435362633] [2021-11-07 08:15:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 08:15:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 08:15:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4390, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 08:15:50,104 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:53,381 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-11-07 08:15:53,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 08:15:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 08:15:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:53,382 INFO L225 Difference]: With dead ends: 78 [2021-11-07 08:15:53,382 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:15:53,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=486, Invalid=16806, Unknown=0, NotChecked=0, Total=17292 [2021-11-07 08:15:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:15:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-07 08:15:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-11-07 08:15:53,387 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-11-07 08:15:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:53,387 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-11-07 08:15:53,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:15:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-11-07 08:15:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:15:53,388 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:53,388 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 08:15:53,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:15:53,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:15:53,589 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:53,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:53,589 INFO L85 PathProgramCache]: Analyzing trace with hash -302765105, now seen corresponding path program 33 times [2021-11-07 08:15:53,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:53,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198535938] [2021-11-07 08:15:53,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:53,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:55,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:55,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198535938] [2021-11-07 08:15:55,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198535938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:55,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673290464] [2021-11-07 08:15:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:15:55,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:55,803 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:15:59,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 08:15:59,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:15:59,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 273 conjunts are in the unsatisfiable core [2021-11-07 08:15:59,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:59,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673290464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:59,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:59,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-07 08:15:59,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202416948] [2021-11-07 08:15:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 08:15:59,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 08:15:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4659, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:15:59,759 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:03,276 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-11-07 08:16:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 08:16:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-07 08:16:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:03,277 INFO L225 Difference]: With dead ends: 80 [2021-11-07 08:16:03,277 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 08:16:03,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=501, Invalid=17859, Unknown=0, NotChecked=0, Total=18360 [2021-11-07 08:16:03,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 08:16:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-07 08:16:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-11-07 08:16:03,286 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-11-07 08:16:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:03,286 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-11-07 08:16:03,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-11-07 08:16:03,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 08:16:03,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:03,287 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:03,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:03,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:16:03,487 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1153742577, now seen corresponding path program 34 times [2021-11-07 08:16:03,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:03,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087930332] [2021-11-07 08:16:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:03,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:05,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087930332] [2021-11-07 08:16:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087930332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910167939] [2021-11-07 08:16:05,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:16:05,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:05,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:05,646 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:05,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:16:06,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:16:06,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:16:06,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 275 conjunts are in the unsatisfiable core [2021-11-07 08:16:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:16:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:07,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910167939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:07,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:16:07,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-07 08:16:07,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594383334] [2021-11-07 08:16:07,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 08:16:07,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 08:16:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4936, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 08:16:07,156 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:10,854 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-11-07 08:16:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 08:16:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-11-07 08:16:10,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:10,855 INFO L225 Difference]: With dead ends: 82 [2021-11-07 08:16:10,855 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 08:16:10,857 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=516, Invalid=18944, Unknown=0, NotChecked=0, Total=19460 [2021-11-07 08:16:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 08:16:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-07 08:16:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-07 08:16:10,861 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-11-07 08:16:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:10,861 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-07 08:16:10,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:16:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-07 08:16:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:16:10,862 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:10,862 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 08:16:10,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:11,063 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash 698286483, now seen corresponding path program 35 times [2021-11-07 08:16:11,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:11,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061312018] [2021-11-07 08:16:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:11,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:13,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:13,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061312018] [2021-11-07 08:16:13,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061312018] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:16:13,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907989326] [2021-11-07 08:16:13,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:16:13,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:13,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:16:13,442 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:16:13,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:17:17,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 08:17:17,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:17,820 WARN L261 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 283 conjunts are in the unsatisfiable core [2021-11-07 08:17:17,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:18,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907989326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:18,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:18,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-11-07 08:17:18,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243703798] [2021-11-07 08:17:18,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 08:17:18,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:18,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 08:17:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 08:17:18,315 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:22,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:22,206 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-11-07 08:17:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 08:17:22,207 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:17:22,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:22,207 INFO L225 Difference]: With dead ends: 84 [2021-11-07 08:17:22,207 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 08:17:22,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=531, Invalid=20061, Unknown=0, NotChecked=0, Total=20592 [2021-11-07 08:17:22,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 08:17:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-07 08:17:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-11-07 08:17:22,211 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-11-07 08:17:22,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:22,212 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-11-07 08:17:22,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-11-07 08:17:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:17:22,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:22,213 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:22,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:22,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:17:22,421 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1091644341, now seen corresponding path program 36 times [2021-11-07 08:17:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:22,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618488034] [2021-11-07 08:17:22,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:22,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:24,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:24,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618488034] [2021-11-07 08:17:24,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618488034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:24,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171633032] [2021-11-07 08:17:24,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:17:24,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:24,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:24,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:17:31,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 08:17:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:31,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 299 conjunts are in the unsatisfiable core [2021-11-07 08:17:31,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:32,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171633032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:32,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:32,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-07 08:17:32,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270259900] [2021-11-07 08:17:32,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 08:17:32,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 08:17:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=5514, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 08:17:32,245 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:36,399 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-11-07 08:17:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 08:17:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 08:17:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:36,400 INFO L225 Difference]: With dead ends: 86 [2021-11-07 08:17:36,400 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 08:17:36,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=546, Invalid=21210, Unknown=0, NotChecked=0, Total=21756 [2021-11-07 08:17:36,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 08:17:36,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-07 08:17:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-11-07 08:17:36,404 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-11-07 08:17:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:36,404 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-11-07 08:17:36,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:36,405 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-11-07 08:17:36,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:17:36,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:36,405 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:36,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:36,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:17:36,606 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1151423831, now seen corresponding path program 37 times [2021-11-07 08:17:36,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:36,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658862470] [2021-11-07 08:17:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:36,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:39,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:39,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658862470] [2021-11-07 08:17:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658862470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:39,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494698865] [2021-11-07 08:17:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:17:39,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:39,077 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:39,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:17:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:40,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 299 conjunts are in the unsatisfiable core [2021-11-07 08:17:40,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:40,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:40,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494698865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:40,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:40,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-07 08:17:40,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3964309] [2021-11-07 08:17:40,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 08:17:40,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:40,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 08:17:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:17:40,923 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:45,333 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-11-07 08:17:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 08:17:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-07 08:17:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:45,336 INFO L225 Difference]: With dead ends: 88 [2021-11-07 08:17:45,336 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 08:17:45,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=561, Invalid=22391, Unknown=0, NotChecked=0, Total=22952 [2021-11-07 08:17:45,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 08:17:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-07 08:17:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-07 08:17:45,344 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-11-07 08:17:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:45,344 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-07 08:17:45,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-07 08:17:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:17:45,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:45,345 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:45,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-07 08:17:45,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:17:45,549 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:45,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:45,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1530028423, now seen corresponding path program 38 times [2021-11-07 08:17:45,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:45,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926528830] [2021-11-07 08:17:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:45,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:48,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926528830] [2021-11-07 08:17:48,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926528830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:48,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649004420] [2021-11-07 08:17:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:17:48,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:48,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:48,388 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:48,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:17:49,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:17:49,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:49,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 307 conjunts are in the unsatisfiable core [2021-11-07 08:17:49,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:50,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649004420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:50,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:50,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-11-07 08:17:50,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545675194] [2021-11-07 08:17:50,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 08:17:50,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:50,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 08:17:50,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6124, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 08:17:50,314 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:54,981 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-11-07 08:17:54,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 08:17:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-07 08:17:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:54,982 INFO L225 Difference]: With dead ends: 90 [2021-11-07 08:17:54,983 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 08:17:54,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=576, Invalid=23604, Unknown=0, NotChecked=0, Total=24180 [2021-11-07 08:17:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 08:17:54,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-07 08:17:54,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:54,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-11-07 08:17:54,990 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-11-07 08:17:54,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:54,991 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-11-07 08:17:54,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:54,991 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-11-07 08:17:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:17:54,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:54,992 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:55,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:55,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:17:55,201 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:55,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1425266917, now seen corresponding path program 39 times [2021-11-07 08:17:55,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:55,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828958497] [2021-11-07 08:17:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:55,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:17:58,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:58,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828958497] [2021-11-07 08:17:58,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828958497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:58,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189573923] [2021-11-07 08:17:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:17:58,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:58,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:58,143 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:58,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:18:02,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-07 08:18:02,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:02,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 321 conjunts are in the unsatisfiable core [2021-11-07 08:18:02,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:02,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189573923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:02,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:02,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-07 08:18:02,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516377700] [2021-11-07 08:18:02,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 08:18:02,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:02,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 08:18:02,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=6441, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:18:02,813 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:07,648 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-11-07 08:18:07,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 08:18:07,648 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 08:18:07,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:07,649 INFO L225 Difference]: With dead ends: 92 [2021-11-07 08:18:07,649 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 08:18:07,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3005 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=591, Invalid=24849, Unknown=0, NotChecked=0, Total=25440 [2021-11-07 08:18:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 08:18:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-07 08:18:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-07 08:18:07,654 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-11-07 08:18:07,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:07,654 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-07 08:18:07,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-07 08:18:07,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:18:07,655 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:07,655 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:07,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:07,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:18:07,855 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:07,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:07,856 INFO L85 PathProgramCache]: Analyzing trace with hash 466292541, now seen corresponding path program 40 times [2021-11-07 08:18:07,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:07,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104980987] [2021-11-07 08:18:07,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:07,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:10,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:10,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104980987] [2021-11-07 08:18:10,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104980987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:10,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201597712] [2021-11-07 08:18:10,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:18:10,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:10,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:10,873 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:10,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:18:12,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:18:12,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:12,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 323 conjunts are in the unsatisfiable core [2021-11-07 08:18:12,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:12,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201597712] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:12,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:12,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-07 08:18:12,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829431824] [2021-11-07 08:18:12,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 08:18:12,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 08:18:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=6766, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 08:18:12,864 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:17,961 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-11-07 08:18:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 08:18:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 08:18:17,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:17,962 INFO L225 Difference]: With dead ends: 94 [2021-11-07 08:18:17,962 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 08:18:17,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3162 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=606, Invalid=26126, Unknown=0, NotChecked=0, Total=26732 [2021-11-07 08:18:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 08:18:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-07 08:18:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-07 08:18:17,971 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-11-07 08:18:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:17,971 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-07 08:18:17,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-07 08:18:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 08:18:17,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:17,972 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:18,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:18,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-07 08:18:18,189 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:18,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1483765471, now seen corresponding path program 41 times [2021-11-07 08:18:18,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:18,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905767716] [2021-11-07 08:18:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:18,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:18:21,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:21,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905767716] [2021-11-07 08:18:21,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905767716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:21,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469942935] [2021-11-07 08:18:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:18:21,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:21,305 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:21,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:20:17,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-07 08:20:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:17,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 331 conjunts are in the unsatisfiable core [2021-11-07 08:20:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:17,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469942935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:17,815 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:17,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-11-07 08:20:17,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570332938] [2021-11-07 08:20:17,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 08:20:17,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:17,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 08:20:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=7099, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 08:20:17,817 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:23,064 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-11-07 08:20:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 08:20:23,065 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-11-07 08:20:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:23,065 INFO L225 Difference]: With dead ends: 96 [2021-11-07 08:20:23,065 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 08:20:23,067 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3323 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=621, Invalid=27435, Unknown=0, NotChecked=0, Total=28056 [2021-11-07 08:20:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 08:20:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-07 08:20:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-11-07 08:20:23,072 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-11-07 08:20:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:23,072 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-11-07 08:20:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-11-07 08:20:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 08:20:23,073 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:23,074 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:23,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:23,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 08:20:23,281 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:23,281 INFO L85 PathProgramCache]: Analyzing trace with hash 22707713, now seen corresponding path program 42 times [2021-11-07 08:20:23,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:23,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358708304] [2021-11-07 08:20:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:23,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:26,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:26,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358708304] [2021-11-07 08:20:26,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358708304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:26,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077943976] [2021-11-07 08:20:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:20:26,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:26,501 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:26,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:20:33,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-07 08:20:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:33,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 346 conjunts are in the unsatisfiable core [2021-11-07 08:20:33,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:34,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077943976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:34,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:34,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-07 08:20:34,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809827584] [2021-11-07 08:20:34,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-07 08:20:34,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-07 08:20:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 08:20:34,523 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:40,031 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-11-07 08:20:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 08:20:40,031 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 08:20:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:40,032 INFO L225 Difference]: With dead ends: 98 [2021-11-07 08:20:40,032 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 08:20:40,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3488 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=636, Invalid=28776, Unknown=0, NotChecked=0, Total=29412 [2021-11-07 08:20:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 08:20:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-07 08:20:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-11-07 08:20:40,037 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-11-07 08:20:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:40,038 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-11-07 08:20:40,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-11-07 08:20:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 08:20:40,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:40,039 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:40,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-07 08:20:40,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:40,241 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:40,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:40,241 INFO L85 PathProgramCache]: Analyzing trace with hash 400508067, now seen corresponding path program 43 times [2021-11-07 08:20:40,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:40,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112377906] [2021-11-07 08:20:40,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:40,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:43,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:43,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112377906] [2021-11-07 08:20:43,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112377906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:43,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158594824] [2021-11-07 08:20:43,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:20:43,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:43,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:43,567 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:43,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:20:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:45,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 347 conjunts are in the unsatisfiable core [2021-11-07 08:20:45,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158594824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:45,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:45,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-07 08:20:45,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48106672] [2021-11-07 08:20:45,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 08:20:45,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:45,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 08:20:45,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 08:20:45,803 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:20:51,517 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-11-07 08:20:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 08:20:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 08:20:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:20:51,519 INFO L225 Difference]: With dead ends: 100 [2021-11-07 08:20:51,519 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 08:20:51,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3657 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=651, Invalid=30149, Unknown=0, NotChecked=0, Total=30800 [2021-11-07 08:20:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 08:20:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-07 08:20:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-07 08:20:51,528 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-11-07 08:20:51,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:20:51,528 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-07 08:20:51,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:20:51,529 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-07 08:20:51,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 08:20:51,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:20:51,529 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-11-07 08:20:51,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 08:20:51,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:51,737 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:20:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:20:51,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1605571899, now seen corresponding path program 44 times [2021-11-07 08:20:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:20:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123383302] [2021-11-07 08:20:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:20:51,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:20:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:20:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:55,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:20:55,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123383302] [2021-11-07 08:20:55,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123383302] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:55,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390661393] [2021-11-07 08:20:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:20:55,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:20:55,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:20:55,238 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:20:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:20:56,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:20:56,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:20:56,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 355 conjunts are in the unsatisfiable core [2021-11-07 08:20:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:20:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:20:57,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390661393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:20:57,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:20:57,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-11-07 08:20:57,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064706662] [2021-11-07 08:20:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-07 08:20:57,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:20:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-07 08:20:57,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=8146, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 08:20:57,522 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:03,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:03,534 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-11-07 08:21:03,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 08:21:03,534 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-11-07 08:21:03,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:03,535 INFO L225 Difference]: With dead ends: 102 [2021-11-07 08:21:03,535 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 08:21:03,537 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3830 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=666, Invalid=31554, Unknown=0, NotChecked=0, Total=32220 [2021-11-07 08:21:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 08:21:03,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-07 08:21:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:03,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-07 08:21:03,542 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-11-07 08:21:03,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:03,543 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-07 08:21:03,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-07 08:21:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 08:21:03,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:03,544 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:03,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:03,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:21:03,749 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1008103321, now seen corresponding path program 45 times [2021-11-07 08:21:03,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:03,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363667373] [2021-11-07 08:21:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:03,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:07,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363667373] [2021-11-07 08:21:07,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363667373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:07,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926936375] [2021-11-07 08:21:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:21:07,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:07,287 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:21:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-07 08:21:14,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:14,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 369 conjunts are in the unsatisfiable core [2021-11-07 08:21:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:15,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926936375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:15,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:15,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-07 08:21:15,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621552788] [2021-11-07 08:21:15,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 08:21:15,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 08:21:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=8511, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:21:15,423 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:21,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:21,668 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-11-07 08:21:21,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 08:21:21,669 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 08:21:21,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:21,669 INFO L225 Difference]: With dead ends: 104 [2021-11-07 08:21:21,669 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 08:21:21,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4007 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=681, Invalid=32991, Unknown=0, NotChecked=0, Total=33672 [2021-11-07 08:21:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 08:21:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-07 08:21:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-07 08:21:21,676 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-11-07 08:21:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:21,676 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-07 08:21:21,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-07 08:21:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 08:21:21,677 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:21,678 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:21,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 08:21:21,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 08:21:21,891 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:21,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:21,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1928549769, now seen corresponding path program 46 times [2021-11-07 08:21:21,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:21,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798634374] [2021-11-07 08:21:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:21,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:25,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:25,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798634374] [2021-11-07 08:21:25,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798634374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:25,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559681163] [2021-11-07 08:21:25,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:21:25,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:25,643 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:25,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:21:27,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:21:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:21:27,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 371 conjunts are in the unsatisfiable core [2021-11-07 08:21:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:21:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:28,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559681163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:28,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:21:28,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-07 08:21:28,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682373770] [2021-11-07 08:21:28,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 08:21:28,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:21:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 08:21:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=8884, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:21:28,246 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:21:34,742 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-11-07 08:21:34,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 08:21:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 08:21:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:21:34,744 INFO L225 Difference]: With dead ends: 106 [2021-11-07 08:21:34,744 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 08:21:34,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4188 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=696, Invalid=34460, Unknown=0, NotChecked=0, Total=35156 [2021-11-07 08:21:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 08:21:34,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-07 08:21:34,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-11-07 08:21:34,750 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-11-07 08:21:34,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:21:34,750 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-11-07 08:21:34,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:21:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-11-07 08:21:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:21:34,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:21:34,751 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-11-07 08:21:34,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-07 08:21:34,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:21:34,951 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:21:34,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:21:34,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2036311509, now seen corresponding path program 47 times [2021-11-07 08:21:34,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:21:34,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998565005] [2021-11-07 08:21:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:21:34,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:21:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:21:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:21:38,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:21:38,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998565005] [2021-11-07 08:21:38,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998565005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:21:38,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533685080] [2021-11-07 08:21:38,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:21:38,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:21:38,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:21:38,834 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:21:38,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0bdd6ea-0594-4dce-acdf-735c2dc4e1cb/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process