./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD --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 80b250f44ccc89442200d93f4bf6653c7aad36a18be4f80bda8f239187e0714d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:40:17,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:40:17,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:40:17,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:40:17,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:40:17,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:40:17,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:40:17,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:40:17,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:40:17,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:40:17,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:40:17,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:40:17,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:40:17,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:40:17,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:40:17,290 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:40:17,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:40:17,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:40:17,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:40:17,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:40:17,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:40:17,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:40:17,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:40:17,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:40:17,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:40:17,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:40:17,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:40:17,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:40:17,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:40:17,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:40:17,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:40:17,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:40:17,333 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:40:17,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:40:17,336 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:40:17,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:40:17,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:40:17,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:40:17,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:40:17,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:40:17,339 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:40:17,340 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:40:17,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:40:17,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:40:17,385 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:40:17,386 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:40:17,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:40:17,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:40:17,388 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:40:17,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:40:17,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:40:17,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:40:17,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:40:17,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:40:17,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:40:17,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:40:17,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:40:17,391 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:40:17,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:40:17,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:40:17,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:40:17,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:40:17,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:40:17,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:40:17,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:40:17,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:40:17,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:40:17,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:40:17,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:40:17,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:40:17,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:40:17,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:40:17,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:40:17,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:40:17,396 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_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 80b250f44ccc89442200d93f4bf6653c7aad36a18be4f80bda8f239187e0714d [2021-10-28 23:40:17,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:40:17,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:40:17,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:40:17,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:40:17,762 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:40:17,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2021-10-28 23:40:17,842 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/data/f7854b874/3d78d1773c5d4f1689da3e2f6f55a6f4/FLAGdd69ba90a [2021-10-28 23:40:18,320 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:40:18,321 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c [2021-10-28 23:40:18,333 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/data/f7854b874/3d78d1773c5d4f1689da3e2f6f55a6f4/FLAGdd69ba90a [2021-10-28 23:40:18,719 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/data/f7854b874/3d78d1773c5d4f1689da3e2f6f55a6f4 [2021-10-28 23:40:18,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:40:18,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:40:18,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:40:18,728 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:40:18,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:40:18,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:18,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77605d06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18, skipping insertion in model container [2021-10-28 23:40:18,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:18,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:40:18,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:40:18,897 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_df5a8369-2351-4f2d-927f-74e27c3158fc/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c[454,467] [2021-10-28 23:40:18,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:40:18,911 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:40:18,925 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_df5a8369-2351-4f2d-927f-74e27c3158fc/sv-benchmarks/c/recursive-simple/id_i20_o20-2.c[454,467] [2021-10-28 23:40:18,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:40:18,953 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:40:18,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18 WrapperNode [2021-10-28 23:40:18,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:40:18,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:40:18,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:40:18,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:40:18,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:18,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:40:19,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:40:19,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:40:19,010 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:40:19,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:40:19,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:40:19,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:40:19,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:40:19,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (1/1) ... [2021-10-28 23:40:19,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:40:19,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:19,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:40:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:40:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:40:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:40:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:40:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-10-28 23:40:19,128 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-10-28 23:40:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:40:19,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:40:19,386 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-28 23:40:19,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19 BoogieIcfgContainer [2021-10-28 23:40:19,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:40:19,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:40:19,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:40:19,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:40:19,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:40:18" (1/3) ... [2021-10-28 23:40:19,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7b383e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:40:19, skipping insertion in model container [2021-10-28 23:40:19,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:40:18" (2/3) ... [2021-10-28 23:40:19,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7b383e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:40:19, skipping insertion in model container [2021-10-28 23:40:19,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19" (3/3) ... [2021-10-28 23:40:19,405 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2021-10-28 23:40:19,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:40:19,418 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:40:19,486 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:40:19,496 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 [2021-10-28 23:40:19,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:40:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 23:40:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 23:40:19,525 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:19,526 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:19,526 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-10-28 23:40:19,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:19,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271302933] [2021-10-28 23:40:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:19,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:19,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:40:19,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271302933] [2021-10-28 23:40:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271302933] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:40:19,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:40:19,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 23:40:19,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569038888] [2021-10-28 23:40:19,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:40:19,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:19,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:40:19,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:40:19,910 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:40:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:19,969 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-10-28 23:40:19,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:40:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-28 23:40:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:19,980 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:40:19,986 INFO L226 Difference]: Without dead ends: 15 [2021-10-28 23:40:19,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:40:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-28 23:40:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-28 23:40:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 23:40:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-28 23:40:20,038 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-10-28 23:40:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:20,039 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-28 23:40:20,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 23:40:20,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-28 23:40:20,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:40:20,042 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:20,043 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:20,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:40:20,044 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-10-28 23:40:20,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:20,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458506776] [2021-10-28 23:40:20,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:40:20,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:20,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458506776] [2021-10-28 23:40:20,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458506776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:20,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657348640] [2021-10-28 23:40:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:20,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:20,254 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:20,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:40:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:40:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 23:40:20,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657348640] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:20,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:20,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-28 23:40:20,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467629837] [2021-10-28 23:40:20,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:40:20,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:40:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:40:20,540 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:40:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:20,599 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-28 23:40:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:40:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 16 [2021-10-28 23:40:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:20,601 INFO L225 Difference]: With dead ends: 22 [2021-10-28 23:40:20,602 INFO L226 Difference]: Without dead ends: 18 [2021-10-28 23:40:20,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:40:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-28 23:40:20,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-28 23:40:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-28 23:40:20,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-28 23:40:20,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-10-28 23:40:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:20,609 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-28 23:40:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 23:40:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-28 23:40:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:40:20,611 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:20,612 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:20,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:20,828 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-10-28 23:40:20,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:20,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516705346] [2021-10-28 23:40:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:20,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:40:20,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:20,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516705346] [2021-10-28 23:40:20,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516705346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:20,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530165973] [2021-10-28 23:40:20,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:20,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:20,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:20,993 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:20,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:40:21,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 23:40:21,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 23:40:21,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530165973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:21,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:21,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-28 23:40:21,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207056427] [2021-10-28 23:40:21,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 23:40:21,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:21,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 23:40:21,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:40:21,249 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:40:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:21,332 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 23:40:21,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:40:21,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 22 [2021-10-28 23:40:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:21,334 INFO L225 Difference]: With dead ends: 25 [2021-10-28 23:40:21,334 INFO L226 Difference]: Without dead ends: 21 [2021-10-28 23:40:21,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:40:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-28 23:40:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-28 23:40:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 23:40:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-28 23:40:21,340 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-10-28 23:40:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:21,341 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-28 23:40:21,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-28 23:40:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-28 23:40:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-28 23:40:21,342 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:21,343 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:21,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:21,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-28 23:40:21,544 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-10-28 23:40:21,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:21,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073191904] [2021-10-28 23:40:21,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:21,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:21,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:21,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:40:21,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:21,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073191904] [2021-10-28 23:40:21,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073191904] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:21,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651713516] [2021-10-28 23:40:21,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:40:21,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:21,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:21,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:21,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:40:21,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:40:21,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:21,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 23:40:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 23:40:21,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651713516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:21,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:21,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-10-28 23:40:21,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267112433] [2021-10-28 23:40:21,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:40:21,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:40:21,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:40:21,958 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:40:22,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:22,137 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-28 23:40:22,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:40:22,150 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 28 [2021-10-28 23:40:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:22,152 INFO L225 Difference]: With dead ends: 28 [2021-10-28 23:40:22,152 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 23:40:22,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:40:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 23:40:22,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 23:40:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-28 23:40:22,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-28 23:40:22,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-10-28 23:40:22,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:22,159 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-28 23:40:22,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 13 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 8 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2021-10-28 23:40:22,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-28 23:40:22,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:40:22,161 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:22,161 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:22,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:22,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:22,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:22,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-10-28 23:40:22,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:22,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618041889] [2021-10-28 23:40:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:22,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:22,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:40:22,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:22,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618041889] [2021-10-28 23:40:22,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618041889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:22,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690700291] [2021-10-28 23:40:22,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:40:22,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:22,576 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:22,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:40:22,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:40:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 23:40:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-28 23:40:22,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690700291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:22,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:22,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-10-28 23:40:22,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773544961] [2021-10-28 23:40:22,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 23:40:22,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:40:22,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:40:22,887 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:40:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:22,955 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 23:40:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:40:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 34 [2021-10-28 23:40:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:22,958 INFO L225 Difference]: With dead ends: 31 [2021-10-28 23:40:22,959 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 23:40:22,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:40:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 23:40:22,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 23:40:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-28 23:40:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 23:40:22,977 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-10-28 23:40:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:22,978 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 23:40:22,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-28 23:40:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 23:40:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:40:22,984 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:22,984 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:23,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:23,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:23,193 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:23,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:23,193 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-10-28 23:40:23,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:23,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926023740] [2021-10-28 23:40:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:23,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:40:23,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:23,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926023740] [2021-10-28 23:40:23,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926023740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:23,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154221571] [2021-10-28 23:40:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:40:23,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:23,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:23,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 23:40:23,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-10-28 23:40:23,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 23:40:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-10-28 23:40:23,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154221571] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:23,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:23,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-28 23:40:23,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123292306] [2021-10-28 23:40:23,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 23:40:23,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:23,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 23:40:23,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-10-28 23:40:23,752 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 23:40:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:23,831 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 23:40:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 23:40:23,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 40 [2021-10-28 23:40:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:23,833 INFO L225 Difference]: With dead ends: 34 [2021-10-28 23:40:23,833 INFO L226 Difference]: Without dead ends: 30 [2021-10-28 23:40:23,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:40:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-28 23:40:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-28 23:40:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2021-10-28 23:40:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 23:40:23,841 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-10-28 23:40:23,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:23,844 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 23:40:23,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 7 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2021-10-28 23:40:23,846 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 23:40:23,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 23:40:23,850 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:23,850 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:23,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:24,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 23:40:24,061 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:24,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:24,061 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-10-28 23:40:24,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:24,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483302788] [2021-10-28 23:40:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:24,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:40:24,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:24,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483302788] [2021-10-28 23:40:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483302788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:24,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459306972] [2021-10-28 23:40:24,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:40:24,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:24,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:24,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 23:40:24,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-28 23:40:24,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:24,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 23:40:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 23:40:24,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459306972] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:24,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:24,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-10-28 23:40:24,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891949209] [2021-10-28 23:40:24,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:40:24,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:24,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:40:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:40:24,724 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 23:40:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:25,003 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 23:40:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:40:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) Word has length 46 [2021-10-28 23:40:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:25,005 INFO L225 Difference]: With dead ends: 37 [2021-10-28 23:40:25,006 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 23:40:25,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 23:40:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 23:40:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-28 23:40:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-10-28 23:40:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-10-28 23:40:25,014 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-10-28 23:40:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:25,014 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-10-28 23:40:25,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.6) internal successors, (40), 19 states have internal predecessors, (40), 3 states have call successors, (4), 1 states have call predecessors, (4), 14 states have return successors, (14), 14 states have call predecessors, (14), 3 states have call successors, (14) [2021-10-28 23:40:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-10-28 23:40:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 23:40:25,016 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:25,017 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:25,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:25,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:25,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:25,236 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-10-28 23:40:25,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:25,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048430902] [2021-10-28 23:40:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:25,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:40:25,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:25,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048430902] [2021-10-28 23:40:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048430902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:25,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975390354] [2021-10-28 23:40:25,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:40:25,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:25,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:25,509 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:25,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 23:40:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 23:40:25,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-28 23:40:25,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975390354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:25,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:25,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-10-28 23:40:25,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446100285] [2021-10-28 23:40:25,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-28 23:40:25,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:25,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-28 23:40:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-10-28 23:40:25,851 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 23:40:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:25,960 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 23:40:25,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 23:40:25,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) Word has length 52 [2021-10-28 23:40:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:25,964 INFO L225 Difference]: With dead ends: 40 [2021-10-28 23:40:25,965 INFO L226 Difference]: Without dead ends: 36 [2021-10-28 23:40:25,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:40:25,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-28 23:40:25,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-28 23:40:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2021-10-28 23:40:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-10-28 23:40:25,980 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-10-28 23:40:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:25,983 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-10-28 23:40:25,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 9 states have return successors, (15), 8 states have call predecessors, (15), 3 states have call successors, (15) [2021-10-28 23:40:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-10-28 23:40:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-28 23:40:25,988 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:25,989 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:26,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:26,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:26,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:26,217 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-10-28 23:40:26,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:26,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507594710] [2021-10-28 23:40:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:26,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:40:26,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:26,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507594710] [2021-10-28 23:40:26,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507594710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:26,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506964525] [2021-10-28 23:40:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:26,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:26,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:26,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 23:40:26,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:26,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-28 23:40:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-28 23:40:26,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506964525] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:26,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:26,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-10-28 23:40:26,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863177346] [2021-10-28 23:40:26,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 23:40:26,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:40:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:40:26,873 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 23:40:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:26,985 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-10-28 23:40:26,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:40:26,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) Word has length 58 [2021-10-28 23:40:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:26,989 INFO L225 Difference]: With dead ends: 43 [2021-10-28 23:40:26,989 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 23:40:26,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:40:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 23:40:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-28 23:40:27,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-10-28 23:40:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-10-28 23:40:27,006 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-10-28 23:40:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:27,007 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-10-28 23:40:27,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 10 states have return successors, (17), 9 states have call predecessors, (17), 3 states have call successors, (17) [2021-10-28 23:40:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-10-28 23:40:27,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 23:40:27,013 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:27,013 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:27,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:27,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:27,237 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-10-28 23:40:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:27,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14695438] [2021-10-28 23:40:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:27,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 23:40:27,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:27,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14695438] [2021-10-28 23:40:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14695438] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:27,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373332703] [2021-10-28 23:40:27,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:40:27,505 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:27,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:27,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:27,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 23:40:27,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-10-28 23:40:27,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:27,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-28 23:40:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-10-28 23:40:28,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373332703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:28,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:28,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2021-10-28 23:40:28,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733975581] [2021-10-28 23:40:28,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 23:40:28,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:28,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 23:40:28,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 23:40:28,241 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 23:40:28,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:28,654 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-10-28 23:40:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:40:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) Word has length 64 [2021-10-28 23:40:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:28,655 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:40:28,655 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:40:28,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 23:40:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:40:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-28 23:40:28,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-28 23:40:28,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-10-28 23:40:28,664 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-10-28 23:40:28,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:28,664 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-10-28 23:40:28,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 25 states have internal predecessors, (52), 3 states have call successors, (4), 1 states have call predecessors, (4), 20 states have return successors, (20), 20 states have call predecessors, (20), 3 states have call successors, (20) [2021-10-28 23:40:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-10-28 23:40:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-28 23:40:28,666 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:28,666 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:28,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:28,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:28,867 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:28,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-10-28 23:40:28,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:28,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782501897] [2021-10-28 23:40:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:28,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:28,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:29,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 23:40:29,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:29,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782501897] [2021-10-28 23:40:29,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782501897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:29,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904399423] [2021-10-28 23:40:29,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:40:29,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:29,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:29,233 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:29,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 23:40:29,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:40:29,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 23:40:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 23:40:29,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904399423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:29,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:29,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-10-28 23:40:29,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548767149] [2021-10-28 23:40:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 23:40:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 23:40:29,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-10-28 23:40:29,771 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 23:40:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:29,925 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-10-28 23:40:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 23:40:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) Word has length 70 [2021-10-28 23:40:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:29,927 INFO L225 Difference]: With dead ends: 49 [2021-10-28 23:40:29,927 INFO L226 Difference]: Without dead ends: 45 [2021-10-28 23:40:29,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-10-28 23:40:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-28 23:40:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-28 23:40:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-10-28 23:40:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-10-28 23:40:29,933 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-10-28 23:40:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:29,934 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-10-28 23:40:29,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 17 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 12 states have return successors, (21), 11 states have call predecessors, (21), 3 states have call successors, (21) [2021-10-28 23:40:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-10-28 23:40:29,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 23:40:29,935 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:29,935 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:29,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,136 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-10-28 23:40:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:30,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470446627] [2021-10-28 23:40:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:30,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 23:40:30,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:30,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470446627] [2021-10-28 23:40:30,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470446627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:30,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176280621] [2021-10-28 23:40:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:40:30,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:30,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:30,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 23:40:30,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-28 23:40:30,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:30,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 23:40:30,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-10-28 23:40:31,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176280621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:31,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:31,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-10-28 23:40:31,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676554761] [2021-10-28 23:40:31,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 23:40:31,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:31,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:40:31,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:40:31,091 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 23:40:31,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:31,214 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-10-28 23:40:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 23:40:31,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) Word has length 76 [2021-10-28 23:40:31,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:31,216 INFO L225 Difference]: With dead ends: 52 [2021-10-28 23:40:31,216 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 23:40:31,217 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2021-10-28 23:40:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 23:40:31,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 23:40:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2021-10-28 23:40:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-10-28 23:40:31,222 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-10-28 23:40:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:31,222 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-10-28 23:40:31,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 13 states have return successors, (23), 12 states have call predecessors, (23), 3 states have call successors, (23) [2021-10-28 23:40:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-10-28 23:40:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-28 23:40:31,223 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:31,224 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:31,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-28 23:40:31,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-28 23:40:31,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-10-28 23:40:31,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:31,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417320480] [2021-10-28 23:40:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:31,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 23:40:31,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:31,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417320480] [2021-10-28 23:40:31,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417320480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:31,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637575884] [2021-10-28 23:40:31,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:40:31,827 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:31,828 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:31,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 23:40:32,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-28 23:40:32,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 23:40:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-10-28 23:40:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637575884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:32,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-10-28 23:40:32,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192059355] [2021-10-28 23:40:32,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 23:40:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 23:40:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-10-28 23:40:32,430 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 23:40:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:32,589 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-10-28 23:40:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:40:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) Word has length 82 [2021-10-28 23:40:32,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:32,591 INFO L225 Difference]: With dead ends: 55 [2021-10-28 23:40:32,591 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 23:40:32,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2021-10-28 23:40:32,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 23:40:32,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-28 23:40:32,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-10-28 23:40:32,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-10-28 23:40:32,597 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-10-28 23:40:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:32,598 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-10-28 23:40:32,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 14 states have return successors, (25), 13 states have call predecessors, (25), 3 states have call successors, (25) [2021-10-28 23:40:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-10-28 23:40:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-28 23:40:32,599 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:32,600 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:32,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:32,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:32,825 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:32,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-10-28 23:40:32,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:32,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104362553] [2021-10-28 23:40:32,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:32,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:32,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 23:40:33,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:33,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104362553] [2021-10-28 23:40:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104362553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:33,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142504308] [2021-10-28 23:40:33,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:40:33,231 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:33,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:33,232 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 23:40:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:33,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 23:40:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-10-28 23:40:33,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142504308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:33,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:33,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-10-28 23:40:33,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314739843] [2021-10-28 23:40:33,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 23:40:33,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:33,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:40:33,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:40:33,909 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 23:40:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:34,081 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-10-28 23:40:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 23:40:34,082 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) Word has length 88 [2021-10-28 23:40:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:34,083 INFO L225 Difference]: With dead ends: 58 [2021-10-28 23:40:34,083 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 23:40:34,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 23:40:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 23:40:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 23:40:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2021-10-28 23:40:34,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-10-28 23:40:34,091 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-10-28 23:40:34,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:34,092 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-10-28 23:40:34,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 20 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 15 states have return successors, (27), 14 states have call predecessors, (27), 3 states have call successors, (27) [2021-10-28 23:40:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-10-28 23:40:34,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-28 23:40:34,093 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:34,094 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:34,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:34,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 23:40:34,317 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-10-28 23:40:34,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:34,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170992594] [2021-10-28 23:40:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:34,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 23:40:34,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:34,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170992594] [2021-10-28 23:40:34,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170992594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:34,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309624206] [2021-10-28 23:40:34,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:40:34,795 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:34,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:34,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 23:40:35,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:40:35,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:35,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 23:40:35,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-10-28 23:40:35,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309624206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:35,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-10-28 23:40:35,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776423373] [2021-10-28 23:40:35,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 23:40:35,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 23:40:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-10-28 23:40:35,468 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 23:40:35,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:35,675 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-28 23:40:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:40:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) Word has length 94 [2021-10-28 23:40:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:35,677 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:40:35,677 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 23:40:35,683 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 23:40:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 23:40:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-28 23:40:35,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-10-28 23:40:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-10-28 23:40:35,696 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-10-28 23:40:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:35,697 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-10-28 23:40:35,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 16 states have return successors, (29), 15 states have call predecessors, (29), 3 states have call successors, (29) [2021-10-28 23:40:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-10-28 23:40:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-28 23:40:35,700 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:35,701 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:35,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:35,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 23:40:35,917 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-10-28 23:40:35,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:35,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411329173] [2021-10-28 23:40:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:35,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 23:40:36,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:36,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411329173] [2021-10-28 23:40:36,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411329173] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:36,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261066512] [2021-10-28 23:40:36,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:40:36,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:36,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:36,441 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:36,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 23:40:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:40:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-28 23:40:36,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-10-28 23:40:37,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261066512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:37,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-10-28 23:40:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284171890] [2021-10-28 23:40:37,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-28 23:40:37,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:37,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:40:37,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:40:37,275 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 23:40:37,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:37,445 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-10-28 23:40:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 23:40:37,446 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) Word has length 100 [2021-10-28 23:40:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:37,447 INFO L225 Difference]: With dead ends: 64 [2021-10-28 23:40:37,447 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 23:40:37,448 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 23:40:37,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 23:40:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 23:40:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2021-10-28 23:40:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-10-28 23:40:37,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-10-28 23:40:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-10-28 23:40:37,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 22 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 17 states have return successors, (31), 16 states have call predecessors, (31), 3 states have call successors, (31) [2021-10-28 23:40:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-10-28 23:40:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-28 23:40:37,457 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:37,457 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:37,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:37,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 23:40:37,681 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:37,681 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-10-28 23:40:37,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:37,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263452034] [2021-10-28 23:40:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:37,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:37,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:37,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 23:40:38,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:38,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263452034] [2021-10-28 23:40:38,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263452034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:38,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354915252] [2021-10-28 23:40:38,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:40:38,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:38,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:38,189 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:38,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 23:40:38,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:40:38,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-28 23:40:38,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-10-28 23:40:38,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354915252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:38,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:38,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-10-28 23:40:38,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956787868] [2021-10-28 23:40:38,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 23:40:38,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 23:40:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-10-28 23:40:38,893 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 23:40:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:39,092 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-10-28 23:40:39,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:40:39,092 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) Word has length 106 [2021-10-28 23:40:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:39,093 INFO L225 Difference]: With dead ends: 67 [2021-10-28 23:40:39,093 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 23:40:39,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 23:40:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 23:40:39,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 23:40:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-10-28 23:40:39,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-10-28 23:40:39,108 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-10-28 23:40:39,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:39,109 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-10-28 23:40:39,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 23 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 18 states have return successors, (33), 17 states have call predecessors, (33), 3 states have call successors, (33) [2021-10-28 23:40:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-10-28 23:40:39,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-10-28 23:40:39,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:39,113 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:39,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:39,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 23:40:39,314 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-10-28 23:40:39,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:39,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091874488] [2021-10-28 23:40:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:39,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 23:40:39,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091874488] [2021-10-28 23:40:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091874488] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:39,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578743573] [2021-10-28 23:40:39,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:40:39,876 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:39,877 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:39,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 23:40:40,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-10-28 23:40:40,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:40,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-28 23:40:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-10-28 23:40:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578743573] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:40,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:40,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-10-28 23:40:40,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358064356] [2021-10-28 23:40:40,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-28 23:40:40,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:40,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-28 23:40:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-10-28 23:40:40,725 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 23:40:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:40,950 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-10-28 23:40:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-28 23:40:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) Word has length 112 [2021-10-28 23:40:40,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:40,951 INFO L225 Difference]: With dead ends: 70 [2021-10-28 23:40:40,952 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 23:40:40,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 23:40:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 23:40:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 23:40:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2021-10-28 23:40:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-10-28 23:40:40,964 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-10-28 23:40:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:40,965 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-10-28 23:40:40,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 24 states have internal predecessors, (47), 3 states have call successors, (3), 1 states have call predecessors, (3), 19 states have return successors, (35), 18 states have call predecessors, (35), 3 states have call successors, (35) [2021-10-28 23:40:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-10-28 23:40:40,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-28 23:40:40,967 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:40,967 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:40,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:41,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 23:40:41,177 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-10-28 23:40:41,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:41,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518226504] [2021-10-28 23:40:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:41,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 23:40:41,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:41,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518226504] [2021-10-28 23:40:41,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518226504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:41,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870812241] [2021-10-28 23:40:41,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:40:41,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:41,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:41,809 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:41,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 23:40:42,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-28 23:40:42,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:40:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 23:40:42,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-10-28 23:40:43,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870812241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:43,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:43,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 41] total 62 [2021-10-28 23:40:43,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28674527] [2021-10-28 23:40:43,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-28 23:40:43,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:43,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-28 23:40:43,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=3166, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 23:40:43,507 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) [2021-10-28 23:40:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:44,498 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-10-28 23:40:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 23:40:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) Word has length 118 [2021-10-28 23:40:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:44,501 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:40:44,501 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 23:40:44,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1773, Invalid=7929, Unknown=0, NotChecked=0, Total=9702 [2021-10-28 23:40:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 23:40:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-28 23:40:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-10-28 23:40:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-10-28 23:40:44,512 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-10-28 23:40:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:44,512 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-10-28 23:40:44,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 43 states have internal predecessors, (88), 3 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (38), 38 states have call predecessors, (38), 3 states have call successors, (38) [2021-10-28 23:40:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-10-28 23:40:44,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-10-28 23:40:44,514 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:44,515 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:44,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:44,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:44,741 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-10-28 23:40:44,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:44,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141044246] [2021-10-28 23:40:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:44,741 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:44,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:44,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:44,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:44,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-10-28 23:40:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 23:40:45,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:40:45,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141044246] [2021-10-28 23:40:45,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141044246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:45,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471301409] [2021-10-28 23:40:45,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:40:45,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:45,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:40:45,528 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:40:45,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 23:40:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:40:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-28 23:40:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:40:46,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-10-28 23:40:46,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471301409] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:40:46,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:40:46,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-10-28 23:40:46,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849396999] [2021-10-28 23:40:46,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 23:40:46,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:40:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 23:40:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-10-28 23:40:46,483 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 23:40:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:40:46,723 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-10-28 23:40:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 23:40:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) Word has length 124 [2021-10-28 23:40:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:40:46,725 INFO L225 Difference]: With dead ends: 76 [2021-10-28 23:40:46,725 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 23:40:46,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-10-28 23:40:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 23:40:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-28 23:40:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2021-10-28 23:40:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 23:40:46,732 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-10-28 23:40:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:40:46,733 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 23:40:46,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 21 states have return successors, (39), 20 states have call predecessors, (39), 3 states have call successors, (39) [2021-10-28 23:40:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 23:40:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-28 23:40:46,734 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:40:46,734 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:40:46,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:40:46,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:40:46,949 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:40:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:40:46,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-10-28 23:40:46,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:40:46,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649061809] [2021-10-28 23:40:46,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:40:46,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:40:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:40:46,974 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:40:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:40:47,059 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:40:47,059 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:40:47,060 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:40:47,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 23:40:47,067 INFO L731 BasicCegarLoop]: Path program histogram: [20, 1] [2021-10-28 23:40:47,071 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:40:47,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:40:47 BoogieIcfgContainer [2021-10-28 23:40:47,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:40:47,160 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:40:47,160 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:40:47,161 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:40:47,161 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:40:19" (3/4) ... [2021-10-28 23:40:47,163 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:40:47,224 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:40:47,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:40:47,226 INFO L168 Benchmark]: Toolchain (without parser) took 28502.35 ms. Allocated memory was 94.4 MB in the beginning and 207.6 MB in the end (delta: 113.2 MB). Free memory was 55.9 MB in the beginning and 68.0 MB in the end (delta: -12.1 MB). Peak memory consumption was 103.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,227 INFO L168 Benchmark]: CDTParser took 1.17 ms. Allocated memory is still 94.4 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:40:47,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.25 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 55.8 MB in the beginning and 95.9 MB in the end (delta: -40.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,228 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 117.4 MB. Free memory was 95.9 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,229 INFO L168 Benchmark]: Boogie Preprocessor took 18.18 ms. Allocated memory is still 117.4 MB. Free memory was 94.6 MB in the beginning and 93.6 MB in the end (delta: 917.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:40:47,229 INFO L168 Benchmark]: RCFGBuilder took 360.07 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 84.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,230 INFO L168 Benchmark]: TraceAbstraction took 27769.34 ms. Allocated memory was 117.4 MB in the beginning and 207.6 MB in the end (delta: 90.2 MB). Free memory was 84.1 MB in the beginning and 73.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 102.3 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,230 INFO L168 Benchmark]: Witness Printer took 64.56 ms. Allocated memory is still 207.6 MB. Free memory was 73.3 MB in the beginning and 68.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:40:47,233 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.17 ms. Allocated memory is still 94.4 MB. Free memory is still 72.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.25 ms. Allocated memory was 94.4 MB in the beginning and 117.4 MB in the end (delta: 23.1 MB). Free memory was 55.8 MB in the beginning and 95.9 MB in the end (delta: -40.2 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.17 ms. Allocated memory is still 117.4 MB. Free memory was 95.9 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.18 ms. Allocated memory is still 117.4 MB. Free memory was 94.6 MB in the beginning and 93.6 MB in the end (delta: 917.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 360.07 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 84.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 27769.34 ms. Allocated memory was 117.4 MB in the beginning and 207.6 MB in the end (delta: 90.2 MB). Free memory was 84.1 MB in the beginning and 73.3 MB in the end (delta: 10.8 MB). Peak memory consumption was 102.3 MB. Max. memory is 16.1 GB. * Witness Printer took 64.56 ms. Allocated memory is still 207.6 MB. Free memory was 73.3 MB in the beginning and 68.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int input = 20; [L13] CALL, EXPR id(input) VAL [\old(x)=20] [L7] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L8] CALL, EXPR id(x-1) VAL [\old(x)=19] [L7] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L8] CALL, EXPR id(x-1) VAL [\old(x)=18] [L7] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L8] CALL, EXPR id(x-1) VAL [\old(x)=17] [L7] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L8] CALL, EXPR id(x-1) VAL [\old(x)=16] [L7] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L8] CALL, EXPR id(x-1) VAL [\old(x)=15] [L7] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L8] CALL, EXPR id(x-1) VAL [\old(x)=14] [L7] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L8] CALL, EXPR id(x-1) VAL [\old(x)=13] [L7] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L8] CALL, EXPR id(x-1) VAL [\old(x)=12] [L7] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L8] CALL, EXPR id(x-1) VAL [\old(x)=11] [L7] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L8] CALL, EXPR id(x-1) VAL [\old(x)=10] [L7] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L8] CALL, EXPR id(x-1) VAL [\old(x)=9] [L7] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L8] CALL, EXPR id(x-1) VAL [\old(x)=8] [L7] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L8] CALL, EXPR id(x-1) VAL [\old(x)=7] [L7] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L8] CALL, EXPR id(x-1) VAL [\old(x)=6] [L7] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L8] CALL, EXPR id(x-1) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 20 [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 27.5s, OverallIterations: 21, TraceHistogramMax: 21, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 201 SDtfs, 658 SDslu, 1236 SDs, 0 SdLazy, 1076 SolverSat, 189 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2247 GetRequests, 1638 SyntacticMatches, 0 SemanticMatches, 609 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5236 ImplicationChecksByTransitivity, 6.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=20, InterpolantAutomatonStates: 326, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 2800 NumberOfCodeBlocks, 2800 NumberOfCodeBlocksAsserted, 142 NumberOfCheckSat, 2631 ConstructedInterpolants, 0 QuantifiedInterpolants, 6599 SizeOfPredicates, 169 NumberOfNonLiveVariables, 3667 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:40:47,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df5a8369-2351-4f2d-927f-74e27c3158fc/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...