./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa --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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:57:48,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:57:48,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:57:48,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:57:48,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:57:48,310 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:57:48,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:57:48,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:57:48,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:57:48,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:57:48,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:57:48,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:57:48,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:57:48,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:57:48,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:57:48,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:57:48,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:57:48,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:57:48,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:57:48,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:57:48,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:57:48,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:57:48,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:57:48,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:57:48,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:57:48,333 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:57:48,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:57:48,334 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:57:48,335 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:57:48,336 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:57:48,336 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:57:48,337 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:57:48,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:57:48,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:57:48,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:57:48,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:57:48,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:57:48,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:57:48,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:57:48,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:57:48,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:57:48,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:57:48,359 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:57:48,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:57:48,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:57:48,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:57:48,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:57:48,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:57:48,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:57:48,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:57:48,361 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:57:48,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:57:48,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:57:48,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:57:48,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:57:48,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:57:48,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:57:48,365 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_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2021-12-06 21:57:48,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:57:48,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:57:48,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:57:48,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:57:48,586 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:57:48,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/loop-simple/deep-nested.c [2021-12-06 21:57:48,640 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/data/8697317a9/db5a8e8107714e379cc6d5cde88ae68f/FLAG3e3499545 [2021-12-06 21:57:49,022 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:57:49,023 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/sv-benchmarks/c/loop-simple/deep-nested.c [2021-12-06 21:57:49,028 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/data/8697317a9/db5a8e8107714e379cc6d5cde88ae68f/FLAG3e3499545 [2021-12-06 21:57:49,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/data/8697317a9/db5a8e8107714e379cc6d5cde88ae68f [2021-12-06 21:57:49,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:57:49,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:57:49,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:57:49,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:57:49,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:57:49,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49, skipping insertion in model container [2021-12-06 21:57:49,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:57:49,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:57:49,182 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-12-06 21:57:49,188 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:57:49,194 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:57:49,207 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2021-12-06 21:57:49,209 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:57:49,218 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:57:49,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49 WrapperNode [2021-12-06 21:57:49,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:57:49,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:57:49,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:57:49,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:57:49,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,244 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2021-12-06 21:57:49,245 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:57:49,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:57:49,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:57:49,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:57:49,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,256 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:57:49,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:57:49,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:57:49,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:57:49,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (1/1) ... [2021-12-06 21:57:49,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:57:49,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:49,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:57:49,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:57:49,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:57:49,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:57:49,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:57:49,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:57:49,388 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:57:49,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:57:49,490 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:57:49,495 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:57:49,495 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-12-06 21:57:49,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:57:49 BoogieIcfgContainer [2021-12-06 21:57:49,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:57:49,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:57:49,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:57:49,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:57:49,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:57:49" (1/3) ... [2021-12-06 21:57:49,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9e5cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:57:49, skipping insertion in model container [2021-12-06 21:57:49,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:57:49" (2/3) ... [2021-12-06 21:57:49,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c9e5cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:57:49, skipping insertion in model container [2021-12-06 21:57:49,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:57:49" (3/3) ... [2021-12-06 21:57:49,503 INFO L111 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2021-12-06 21:57:49,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:57:49,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:57:49,542 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:57:49,547 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 [2021-12-06 21:57:49,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:57:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 21:57:49,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:49,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:49,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash -180366952, now seen corresponding path program 1 times [2021-12-06 21:57:49,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:49,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003452669] [2021-12-06 21:57:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:49,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:57:49,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:49,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003452669] [2021-12-06 21:57:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003452669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:49,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:57:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:57:49,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000712547] [2021-12-06 21:57:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:49,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:57:49,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:49,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:57:49,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:57:49,817 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:49,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:49,890 INFO L93 Difference]: Finished difference Result 39 states and 62 transitions. [2021-12-06 21:57:49,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:57:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 21:57:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:49,901 INFO L225 Difference]: With dead ends: 39 [2021-12-06 21:57:49,901 INFO L226 Difference]: Without dead ends: 18 [2021-12-06 21:57:49,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:57:49,906 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:49,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 20 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:49,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-06 21:57:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-12-06 21:57:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-12-06 21:57:49,930 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2021-12-06 21:57:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:49,930 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-12-06 21:57:49,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-12-06 21:57:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 21:57:49,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:49,932 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:49,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:57:49,932 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:49,933 INFO L85 PathProgramCache]: Analyzing trace with hash -303894894, now seen corresponding path program 1 times [2021-12-06 21:57:49,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:49,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93508811] [2021-12-06 21:57:49,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:49,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:57:50,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:50,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93508811] [2021-12-06 21:57:50,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93508811] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:50,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:57:50,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:57:50,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290481575] [2021-12-06 21:57:50,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:50,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:57:50,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:50,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:57:50,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:57:50,185 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:50,221 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-12-06 21:57:50,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:57:50,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 21:57:50,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:50,222 INFO L225 Difference]: With dead ends: 32 [2021-12-06 21:57:50,223 INFO L226 Difference]: Without dead ends: 30 [2021-12-06 21:57:50,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:57:50,224 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:50,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-06 21:57:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-06 21:57:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2021-12-06 21:57:50,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 12 [2021-12-06 21:57:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:50,230 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2021-12-06 21:57:50,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2021-12-06 21:57:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 21:57:50,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:50,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:57:50,231 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1056396073, now seen corresponding path program 1 times [2021-12-06 21:57:50,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:50,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611996143] [2021-12-06 21:57:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:50,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:57:50,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611996143] [2021-12-06 21:57:50,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611996143] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:50,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316818815] [2021-12-06 21:57:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:50,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:50,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:50,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:50,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:57:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:57:50,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:57:50,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:57:50,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316818815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:50,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:57:50,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-06 21:57:50,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196298465] [2021-12-06 21:57:50,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:50,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:57:50,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:50,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:57:50,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:57:50,445 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:50,510 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2021-12-06 21:57:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:57:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-06 21:57:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:50,512 INFO L225 Difference]: With dead ends: 67 [2021-12-06 21:57:50,512 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 21:57:50,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:57:50,513 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:50,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 21:57:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-12-06 21:57:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-12-06 21:57:50,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2021-12-06 21:57:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:50,521 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-12-06 21:57:50,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-12-06 21:57:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:57:50,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:50,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:50,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:57:50,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:50,723 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:50,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1212980556, now seen corresponding path program 1 times [2021-12-06 21:57:50,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:50,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420262173] [2021-12-06 21:57:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:57:50,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420262173] [2021-12-06 21:57:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420262173] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:50,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035845465] [2021-12-06 21:57:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:50,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:50,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:50,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:50,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:57:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:57:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:57:50,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:57:50,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035845465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:50,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:57:50,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-12-06 21:57:50,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399065221] [2021-12-06 21:57:50,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:50,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:57:50,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:50,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:57:50,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:57:50,916 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:50,978 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-12-06 21:57:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:57:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:57:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:50,979 INFO L225 Difference]: With dead ends: 76 [2021-12-06 21:57:50,980 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 21:57:50,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:57:50,981 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:50,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 16 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 21:57:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2021-12-06 21:57:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-12-06 21:57:50,987 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18 [2021-12-06 21:57:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:50,987 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-12-06 21:57:50,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-12-06 21:57:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 21:57:50,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:50,988 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:51,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:57:51,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:51,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1901462963, now seen corresponding path program 1 times [2021-12-06 21:57:51,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:51,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105998844] [2021-12-06 21:57:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:51,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 21:57:51,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105998844] [2021-12-06 21:57:51,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105998844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:51,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672851374] [2021-12-06 21:57:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:51,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:51,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:51,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:51,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:57:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:51,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:57:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:51,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:57:51,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:57:51,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672851374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:51,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:57:51,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-12-06 21:57:51,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587990213] [2021-12-06 21:57:51,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:51,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:57:51,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:57:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:57:51,382 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:51,440 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-12-06 21:57:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:57:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-06 21:57:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:51,441 INFO L225 Difference]: With dead ends: 76 [2021-12-06 21:57:51,441 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 21:57:51,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:57:51,443 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:51,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 21:57:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-12-06 21:57:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-06 21:57:51,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 21 [2021-12-06 21:57:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:51,451 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-06 21:57:51,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-06 21:57:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-06 21:57:51,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:51,453 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:51,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:57:51,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:51,654 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:51,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1208008852, now seen corresponding path program 1 times [2021-12-06 21:57:51,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:51,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987549372] [2021-12-06 21:57:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:51,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:57:51,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:51,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987549372] [2021-12-06 21:57:51,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987549372] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:51,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234170860] [2021-12-06 21:57:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:51,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:51,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:51,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:57:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 21:57:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:57:52,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:57:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 21:57:52,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234170860] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:57:52,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:57:52,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2021-12-06 21:57:52,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334507947] [2021-12-06 21:57:52,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:57:52,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:57:52,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:57:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:57:52,209 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:53,739 INFO L93 Difference]: Finished difference Result 186 states and 243 transitions. [2021-12-06 21:57:53,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 21:57:53,740 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-06 21:57:53,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:53,741 INFO L225 Difference]: With dead ends: 186 [2021-12-06 21:57:53,741 INFO L226 Difference]: Without dead ends: 111 [2021-12-06 21:57:53,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=509, Invalid=1843, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 21:57:53,743 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 530 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:53,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 64 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:57:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-06 21:57:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2021-12-06 21:57:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-12-06 21:57:53,753 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 27 [2021-12-06 21:57:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:53,754 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-12-06 21:57:53,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-12-06 21:57:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-06 21:57:53,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:53,755 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:53,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:57:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 21:57:53,957 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash -971666175, now seen corresponding path program 2 times [2021-12-06 21:57:53,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:53,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75120639] [2021-12-06 21:57:53,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:53,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 21:57:54,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75120639] [2021-12-06 21:57:54,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75120639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447244080] [2021-12-06 21:57:54,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:57:54,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:54,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:54,141 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:54,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:57:54,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 21:57:54,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:57:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:57:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-12-06 21:57:54,278 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:57:54,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447244080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:54,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:57:54,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-06 21:57:54,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150457866] [2021-12-06 21:57:54,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:54,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:57:54,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:54,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:57:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:57:54,280 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:54,315 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-12-06 21:57:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:57:54,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-06 21:57:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:54,316 INFO L225 Difference]: With dead ends: 73 [2021-12-06 21:57:54,316 INFO L226 Difference]: Without dead ends: 71 [2021-12-06 21:57:54,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:57:54,318 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:54,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-06 21:57:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-12-06 21:57:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 69 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2021-12-06 21:57:54,331 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 48 [2021-12-06 21:57:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2021-12-06 21:57:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2021-12-06 21:57:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:57:54,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:54,333 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:54,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:57:54,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:54,534 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash -414140084, now seen corresponding path program 3 times [2021-12-06 21:57:54,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927984718] [2021-12-06 21:57:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:54,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 17 proven. 64 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-06 21:57:54,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927984718] [2021-12-06 21:57:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927984718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484914370] [2021-12-06 21:57:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:57:54,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:54,716 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:54,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:57:54,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-12-06 21:57:54,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:57:54,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 21:57:54,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-12-06 21:57:54,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:57:54,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484914370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:57:54,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:57:54,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-12-06 21:57:54,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085909401] [2021-12-06 21:57:54,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:57:54,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:57:54,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:54,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:57:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:57:54,871 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:54,907 INFO L93 Difference]: Finished difference Result 117 states and 139 transitions. [2021-12-06 21:57:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:57:54,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 21:57:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:54,908 INFO L225 Difference]: With dead ends: 117 [2021-12-06 21:57:54,908 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 21:57:54,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:57:54,910 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:54,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 13 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:57:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 21:57:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2021-12-06 21:57:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 79 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2021-12-06 21:57:54,923 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 63 [2021-12-06 21:57:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:54,924 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2021-12-06 21:57:54,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:54,924 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2021-12-06 21:57:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 21:57:54,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:54,925 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:54,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:57:55,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:55,126 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:55,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1648728410, now seen corresponding path program 4 times [2021-12-06 21:57:55,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:55,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883744389] [2021-12-06 21:57:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:55,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 20 proven. 83 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-12-06 21:57:55,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883744389] [2021-12-06 21:57:55,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883744389] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:55,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77218402] [2021-12-06 21:57:55,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:57:55,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:55,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:55,392 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:55,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:57:55,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:57:55,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:57:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:57:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 185 proven. 37 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 21:57:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:57:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 161 proven. 61 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 21:57:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77218402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:57:55,751 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:57:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2021-12-06 21:57:55,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066595797] [2021-12-06 21:57:55,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:57:55,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:57:55,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:55,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:57:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:57:55,753 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:56,184 INFO L93 Difference]: Finished difference Result 251 states and 317 transitions. [2021-12-06 21:57:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:57:56,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 21:57:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:56,185 INFO L225 Difference]: With dead ends: 251 [2021-12-06 21:57:56,185 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 21:57:56,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:57:56,187 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 133 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:56,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 69 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:57:56,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 21:57:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2021-12-06 21:57:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1559633027522935) internal successors, (126), 109 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-12-06 21:57:56,202 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 75 [2021-12-06 21:57:56,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:56,202 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-12-06 21:57:56,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.380952380952381) internal successors, (92), 21 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-12-06 21:57:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-06 21:57:56,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:56,205 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:56,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:57:56,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 21:57:56,406 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:56,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1372721946, now seen corresponding path program 5 times [2021-12-06 21:57:56,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:56,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855307438] [2021-12-06 21:57:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:56,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 20 proven. 270 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2021-12-06 21:57:56,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:56,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855307438] [2021-12-06 21:57:56,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855307438] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510180961] [2021-12-06 21:57:56,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:57:56,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:56,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:56,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:56,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:57:57,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 21:57:57,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:57:57,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 21:57:57,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 438 proven. 84 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-06 21:57:57,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:57:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 420 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-06 21:57:57,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510180961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:57:57,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:57:57,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2021-12-06 21:57:57,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671571015] [2021-12-06 21:57:57,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:57:57,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 21:57:57,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:57,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 21:57:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-06 21:57:57,559 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:57:58,575 INFO L93 Difference]: Finished difference Result 514 states and 609 transitions. [2021-12-06 21:57:58,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 21:57:58,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-06 21:57:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:57:58,577 INFO L225 Difference]: With dead ends: 514 [2021-12-06 21:57:58,577 INFO L226 Difference]: Without dead ends: 330 [2021-12-06 21:57:58,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1584, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 21:57:58,579 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 282 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:57:58,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 65 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:57:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-12-06 21:57:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 231. [2021-12-06 21:57:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.1) internal successors, (253), 230 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 253 transitions. [2021-12-06 21:57:58,601 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 253 transitions. Word has length 105 [2021-12-06 21:57:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:57:58,602 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 253 transitions. [2021-12-06 21:57:58,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:57:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 253 transitions. [2021-12-06 21:57:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 21:57:58,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:57:58,604 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 11, 10, 10, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:57:58,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:57:58,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:57:58,805 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:57:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:57:58,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1843530466, now seen corresponding path program 6 times [2021-12-06 21:57:58,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:57:58,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374727231] [2021-12-06 21:57:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:57:58,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:57:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:57:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 26 proven. 950 refuted. 0 times theorem prover too weak. 4392 trivial. 0 not checked. [2021-12-06 21:57:59,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:57:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374727231] [2021-12-06 21:57:59,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374727231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:57:59,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552364305] [2021-12-06 21:57:59,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:57:59,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:57:59,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:57:59,149 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:57:59,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:57:59,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-12-06 21:57:59,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:57:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:57:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:57:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 2703 proven. 540 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2021-12-06 21:57:59,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:57:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5368 backedges. 0 proven. 3243 refuted. 0 times theorem prover too weak. 2125 trivial. 0 not checked. [2021-12-06 21:57:59,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552364305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:57:59,961 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:57:59,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 17 [2021-12-06 21:57:59,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736823442] [2021-12-06 21:57:59,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:57:59,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:57:59,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:57:59,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:57:59,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-06 21:57:59,962 INFO L87 Difference]: Start difference. First operand 231 states and 253 transitions. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:58:01,276 INFO L93 Difference]: Finished difference Result 1439 states and 1642 transitions. [2021-12-06 21:58:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 21:58:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 228 [2021-12-06 21:58:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:58:01,281 INFO L225 Difference]: With dead ends: 1439 [2021-12-06 21:58:01,281 INFO L226 Difference]: Without dead ends: 1213 [2021-12-06 21:58:01,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2021-12-06 21:58:01,283 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 265 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:58:01,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 49 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:58:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-12-06 21:58:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 603. [2021-12-06 21:58:01,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 1.0714285714285714) internal successors, (645), 602 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 645 transitions. [2021-12-06 21:58:01,330 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 645 transitions. Word has length 228 [2021-12-06 21:58:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:58:01,331 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 645 transitions. [2021-12-06 21:58:01,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 645 transitions. [2021-12-06 21:58:01,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2021-12-06 21:58:01,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:58:01,339 INFO L514 BasicCegarLoop]: trace histogram [162, 161, 161, 23, 22, 22, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:58:01,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 21:58:01,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 21:58:01,541 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:58:01,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:58:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 265720766, now seen corresponding path program 7 times [2021-12-06 21:58:01,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:58:01,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187130250] [2021-12-06 21:58:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:58:01,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:58:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 50 proven. 3795 refuted. 0 times theorem prover too weak. 39821 trivial. 0 not checked. [2021-12-06 21:58:02,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:58:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187130250] [2021-12-06 21:58:02,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187130250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:58:02,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394828970] [2021-12-06 21:58:02,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 21:58:02,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:58:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:58:02,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:58:02,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:58:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:58:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:58:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 6966 proven. 206 refuted. 0 times theorem prover too weak. 36494 trivial. 0 not checked. [2021-12-06 21:58:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:58:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 43666 backedges. 6966 proven. 206 refuted. 0 times theorem prover too weak. 36494 trivial. 0 not checked. [2021-12-06 21:58:03,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394828970] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:58:03,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:58:03,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-06 21:58:03,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615150141] [2021-12-06 21:58:03,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:58:03,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 21:58:03,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:58:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 21:58:03,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-12-06 21:58:03,856 INFO L87 Difference]: Start difference. First operand 603 states and 645 transitions. Second operand has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:58:11,352 INFO L93 Difference]: Finished difference Result 2937 states and 3339 transitions. [2021-12-06 21:58:11,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-12-06 21:58:11,352 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 600 [2021-12-06 21:58:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:58:11,360 INFO L225 Difference]: With dead ends: 2937 [2021-12-06 21:58:11,360 INFO L226 Difference]: Without dead ends: 2362 [2021-12-06 21:58:11,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1287 GetRequests, 1187 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3302 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1583, Invalid=8719, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 21:58:11,364 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 649 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:58:11,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 61 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 21:58:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-12-06 21:58:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2132. [2021-12-06 21:58:11,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 1.040356640075082) internal successors, (2217), 2131 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2217 transitions. [2021-12-06 21:58:11,514 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 2217 transitions. Word has length 600 [2021-12-06 21:58:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:58:11,514 INFO L470 AbstractCegarLoop]: Abstraction has 2132 states and 2217 transitions. [2021-12-06 21:58:11,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.962962962962963) internal successors, (107), 27 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 2217 transitions. [2021-12-06 21:58:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2128 [2021-12-06 21:58:11,596 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:58:11,596 INFO L514 BasicCegarLoop]: trace histogram [628, 627, 627, 66, 65, 65, 11, 10, 10, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:58:11,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 21:58:11,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 21:58:11,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:58:11,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:58:11,798 INFO L85 PathProgramCache]: Analyzing trace with hash 306642997, now seen corresponding path program 8 times [2021-12-06 21:58:11,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:58:11,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505729197] [2021-12-06 21:58:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:58:11,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:58:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:58:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 93 proven. 20614 refuted. 0 times theorem prover too weak. 617280 trivial. 0 not checked. [2021-12-06 21:58:16,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:58:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505729197] [2021-12-06 21:58:16,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505729197] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:58:16,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747914367] [2021-12-06 21:58:16,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:58:16,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:58:16,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:58:16,741 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:58:16,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:58:17,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:58:17,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:58:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:58:17,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:58:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 190084 proven. 10961 refuted. 0 times theorem prover too weak. 436942 trivial. 0 not checked. [2021-12-06 21:58:19,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:58:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 637987 backedges. 190078 proven. 10967 refuted. 0 times theorem prover too weak. 436942 trivial. 0 not checked. [2021-12-06 21:58:21,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747914367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:58:21,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:58:21,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2021-12-06 21:58:21,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582295025] [2021-12-06 21:58:21,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:58:21,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 21:58:21,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:58:21,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 21:58:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-12-06 21:58:21,185 INFO L87 Difference]: Start difference. First operand 2132 states and 2217 transitions. Second operand has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:58:32,162 INFO L93 Difference]: Finished difference Result 8560 states and 9365 transitions. [2021-12-06 21:58:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-06 21:58:32,162 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2127 [2021-12-06 21:58:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:58:32,187 INFO L225 Difference]: With dead ends: 8560 [2021-12-06 21:58:32,187 INFO L226 Difference]: Without dead ends: 6465 [2021-12-06 21:58:32,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4362 GetRequests, 4241 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2057, Invalid=12949, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 21:58:32,196 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 842 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:58:32,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 142 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-06 21:58:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2021-12-06 21:58:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 5926. [2021-12-06 21:58:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.029535864978903) internal successors, (6100), 5925 states have internal predecessors, (6100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:32,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6100 transitions. [2021-12-06 21:58:32,686 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6100 transitions. Word has length 2127 [2021-12-06 21:58:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:58:32,687 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6100 transitions. [2021-12-06 21:58:32,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.3) internal successors, (129), 30 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:58:32,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6100 transitions. [2021-12-06 21:58:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5920 [2021-12-06 21:58:32,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:58:32,836 INFO L514 BasicCegarLoop]: trace histogram [1801, 1800, 1800, 144, 143, 143, 24, 23, 23, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:58:32,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 21:58:33,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 21:58:33,038 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:58:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:58:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1135179596, now seen corresponding path program 9 times [2021-12-06 21:58:33,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:58:33,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237874681] [2021-12-06 21:58:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:58:33,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:59:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:59:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 197 proven. 75529 refuted. 0 times theorem prover too weak. 5077502 trivial. 0 not checked. [2021-12-06 21:59:06,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:59:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237874681] [2021-12-06 21:59:06,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237874681] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:59:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750965062] [2021-12-06 21:59:06,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:59:06,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:59:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:59:06,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:59:06,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 21:59:06,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 21:59:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:59:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:59:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:59:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 2578090 proven. 644701 refuted. 0 times theorem prover too weak. 1930437 trivial. 0 not checked. [2021-12-06 21:59:17,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:59:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5153228 backedges. 0 proven. 3222791 refuted. 0 times theorem prover too weak. 1930437 trivial. 0 not checked. [2021-12-06 21:59:29,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750965062] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:59:29,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:59:29,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 5, 5] total 25 [2021-12-06 21:59:29,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155919106] [2021-12-06 21:59:29,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:59:29,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:59:29,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:59:29,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:59:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:59:29,648 INFO L87 Difference]: Start difference. First operand 5926 states and 6100 transitions. Second operand has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:59:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:59:33,902 INFO L93 Difference]: Finished difference Result 24097 states and 25621 transitions. [2021-12-06 21:59:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 21:59:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5919 [2021-12-06 21:59:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:59:33,960 INFO L225 Difference]: With dead ends: 24097 [2021-12-06 21:59:33,960 INFO L226 Difference]: Without dead ends: 18217 [2021-12-06 21:59:33,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11934 GetRequests, 11833 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3193 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1513, Invalid=8993, Unknown=0, NotChecked=0, Total=10506 [2021-12-06 21:59:33,971 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 504 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:59:33,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 61 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 21:59:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18217 states. [2021-12-06 21:59:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18217 to 12251. [2021-12-06 21:59:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12251 states, 12250 states have (on average 1.0249795918367346) internal successors, (12556), 12250 states have internal predecessors, (12556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:59:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12251 states to 12251 states and 12556 transitions. [2021-12-06 21:59:34,831 INFO L78 Accepts]: Start accepts. Automaton has 12251 states and 12556 transitions. Word has length 5919 [2021-12-06 21:59:34,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:59:34,832 INFO L470 AbstractCegarLoop]: Abstraction has 12251 states and 12556 transitions. [2021-12-06 21:59:34,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.76) internal successors, (144), 25 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:59:34,832 INFO L276 IsEmpty]: Start isEmpty. Operand 12251 states and 12556 transitions. [2021-12-06 21:59:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12247 [2021-12-06 21:59:35,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:59:35,412 INFO L514 BasicCegarLoop]: trace histogram [3781, 3780, 3780, 252, 251, 251, 42, 41, 41, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:59:35,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-06 21:59:35,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:59:35,613 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:59:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:59:35,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2136943533, now seen corresponding path program 10 times [2021-12-06 21:59:35,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:59:35,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508181212] [2021-12-06 21:59:35,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:59:35,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:01:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:02:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 22491041 backedges. 347 proven. 181316 refuted. 0 times theorem prover too weak. 22309378 trivial. 0 not checked. [2021-12-06 22:02:18,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:02:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508181212] [2021-12-06 22:02:18,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508181212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:02:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164162652] [2021-12-06 22:02:18,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:02:18,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:02:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:02:18,197 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:02:18,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:02:21,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:02:21,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:02:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 16967 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 22:02:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:02:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 22491041 backedges. 9182179 proven. 922001 refuted. 0 times theorem prover too weak. 12386861 trivial. 0 not checked. [2021-12-06 22:02:39,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:02:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22491041 backedges. 9182132 proven. 922048 refuted. 0 times theorem prover too weak. 12386861 trivial. 0 not checked. [2021-12-06 22:02:52,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164162652] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:02:52,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:02:52,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 9] total 35 [2021-12-06 22:02:52,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432952589] [2021-12-06 22:02:52,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:02:52,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:02:52,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:02:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:02:52,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:02:52,674 INFO L87 Difference]: Start difference. First operand 12251 states and 12556 transitions. Second operand has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:03:10,407 INFO L93 Difference]: Finished difference Result 38074 states and 40251 transitions. [2021-12-06 22:03:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-12-06 22:03:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12246 [2021-12-06 22:03:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:03:10,444 INFO L225 Difference]: With dead ends: 38074 [2021-12-06 22:03:10,444 INFO L226 Difference]: Without dead ends: 25875 [2021-12-06 22:03:10,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24635 GetRequests, 24479 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8382 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2847, Invalid=21959, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:03:10,462 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1203 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1203 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 3957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:03:10,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1203 Valid, 135 Invalid, 3957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 22:03:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25875 states. [2021-12-06 22:03:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25875 to 24238. [2021-12-06 22:03:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24238 states, 24237 states have (on average 1.0214135412798613) internal successors, (24756), 24237 states have internal predecessors, (24756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24238 states to 24238 states and 24756 transitions. [2021-12-06 22:03:12,698 INFO L78 Accepts]: Start accepts. Automaton has 24238 states and 24756 transitions. Word has length 12246 [2021-12-06 22:03:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:03:12,701 INFO L470 AbstractCegarLoop]: Abstraction has 24238 states and 24756 transitions. [2021-12-06 22:03:12,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.457142857142857) internal successors, (156), 35 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:03:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24238 states and 24756 transitions. [2021-12-06 22:03:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24232 [2021-12-06 22:03:15,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:03:15,094 INFO L514 BasicCegarLoop]: trace histogram [7561, 7560, 7560, 432, 431, 431, 72, 71, 71, 12, 11, 11, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 22:03:15,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 22:03:15,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7a668bf-b0cd-498d-8fd5-ddf8bd46df6d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:03:15,295 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:03:15,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:03:15,311 INFO L85 PathProgramCache]: Analyzing trace with hash 980227020, now seen corresponding path program 11 times [2021-12-06 22:03:15,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:03:15,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653978827] [2021-12-06 22:03:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:03:15,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms