./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/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_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:05:25,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:05:25,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:05:25,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:05:25,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:05:25,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:05:25,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:05:25,283 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:05:25,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:05:25,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:05:25,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:05:25,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:05:25,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:05:25,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:05:25,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:05:25,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:05:25,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:05:25,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:05:25,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:05:25,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:05:25,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:05:25,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:05:25,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:05:25,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:05:25,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:05:25,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:05:25,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:05:25,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:05:25,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:05:25,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:05:25,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:05:25,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:05:25,308 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:05:25,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:05:25,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:05:25,310 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:05:25,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:05:25,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:05:25,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:05:25,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:05:25,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:05:25,313 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 19:05:25,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:05:25,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:05:25,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:05:25,331 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:05:25,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:05:25,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:05:25,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:05:25,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:05:25,332 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:05:25,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:05:25,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:05:25,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:05:25,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:05:25,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:05:25,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:05:25,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:25,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:05:25,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:05:25,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:05:25,336 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_ae9694f0-3ac6-4f21-9119-0726e151a742/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2021-12-06 19:05:25,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:05:25,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:05:25,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:05:25,531 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:05:25,532 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:05:25,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-06 19:05:25,575 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/data/7d1fdb71a/a4f399d0d19e497481cbcaf4f6151251/FLAG992b72986 [2021-12-06 19:05:26,165 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:05:26,166 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-06 19:05:26,187 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/data/7d1fdb71a/a4f399d0d19e497481cbcaf4f6151251/FLAG992b72986 [2021-12-06 19:05:26,577 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/data/7d1fdb71a/a4f399d0d19e497481cbcaf4f6151251 [2021-12-06 19:05:26,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:05:26,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:05:26,586 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:26,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:05:26,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:05:26,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:26" (1/1) ... [2021-12-06 19:05:26,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:26, skipping insertion in model container [2021-12-06 19:05:26,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:05:26" (1/1) ... [2021-12-06 19:05:26,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:05:26,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:05:27,213 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_ae9694f0-3ac6-4f21-9119-0726e151a742/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-12-06 19:05:27,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:27,573 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:05:27,672 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_ae9694f0-3ac6-4f21-9119-0726e151a742/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2021-12-06 19:05:27,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:05:27,834 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:05:27,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27 WrapperNode [2021-12-06 19:05:27,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:05:27,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:27,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:05:27,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:05:27,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:27,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:27,925 INFO L137 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2002 [2021-12-06 19:05:27,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:05:27,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:05:27,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:05:27,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:05:27,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:27,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:27,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:27,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:28,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:28,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:28,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:28,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:05:28,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:05:28,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:05:28,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:05:28,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (1/1) ... [2021-12-06 19:05:28,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:05:28,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:28,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:05:28,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:05:28,101 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2021-12-06 19:05:28,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-06 19:05:28,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-06 19:05:28,102 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-06 19:05:28,102 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-06 19:05:28,102 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-06 19:05:28,103 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-06 19:05:28,103 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-06 19:05:28,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 19:05:28,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-06 19:05:28,105 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-06 19:05:28,105 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-12-06 19:05:28,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2021-12-06 19:05:28,105 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2021-12-06 19:05:28,105 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2021-12-06 19:05:28,105 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-12-06 19:05:28,106 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2021-12-06 19:05:28,106 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2021-12-06 19:05:28,106 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-06 19:05:28,106 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-06 19:05:28,106 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2021-12-06 19:05:28,106 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-12-06 19:05:28,107 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-06 19:05:28,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2021-12-06 19:05:28,107 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 19:05:28,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-06 19:05:28,107 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-06 19:05:28,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-06 19:05:28,108 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-06 19:05:28,108 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-06 19:05:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-06 19:05:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-06 19:05:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-06 19:05:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-06 19:05:28,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-06 19:05:28,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:05:28,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:05:28,110 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-06 19:05:28,110 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-06 19:05:28,391 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:05:28,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:05:28,591 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-06 19:05:29,406 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:05:29,420 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:05:29,420 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 19:05:29,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:29 BoogieIcfgContainer [2021-12-06 19:05:29,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:05:29,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:05:29,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:05:29,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:05:29,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:05:26" (1/3) ... [2021-12-06 19:05:29,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69597221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:29, skipping insertion in model container [2021-12-06 19:05:29,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:05:27" (2/3) ... [2021-12-06 19:05:29,430 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69597221 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:05:29, skipping insertion in model container [2021-12-06 19:05:29,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:05:29" (3/3) ... [2021-12-06 19:05:29,431 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2021-12-06 19:05:29,436 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:05:29,436 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 19:05:29,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:05:29,495 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 19:05:29,495 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 19:05:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2021-12-06 19:05:29,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 19:05:29,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:29,543 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:29,543 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:29,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 135613019, now seen corresponding path program 1 times [2021-12-06 19:05:29,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995854826] [2021-12-06 19:05:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:29,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:05:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 19:05:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 19:05:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:05:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:05:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:05:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:05:29,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:29,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995854826] [2021-12-06 19:05:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995854826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:29,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:29,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:29,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272210324] [2021-12-06 19:05:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:29,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:29,972 INFO L87 Difference]: Start difference. First operand has 726 states, 530 states have (on average 1.3716981132075472) internal successors, (727), 546 states have internal predecessors, (727), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:05:31,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:31,374 INFO L93 Difference]: Finished difference Result 2353 states and 3522 transitions. [2021-12-06 19:05:31,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:05:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-12-06 19:05:31,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:31,398 INFO L225 Difference]: With dead ends: 2353 [2021-12-06 19:05:31,399 INFO L226 Difference]: Without dead ends: 1614 [2021-12-06 19:05:31,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:05:31,411 INFO L933 BasicCegarLoop]: 1131 mSDtfsCounter, 1850 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 937 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1989 SdHoareTripleChecker+Valid, 2494 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:31,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1989 Valid, 2494 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:05:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-12-06 19:05:31,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1368. [2021-12-06 19:05:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3538767395626243) internal successors, (1362), 1024 states have internal predecessors, (1362), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2021-12-06 19:05:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1919 transitions. [2021-12-06 19:05:31,566 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1919 transitions. Word has length 53 [2021-12-06 19:05:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:31,567 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1919 transitions. [2021-12-06 19:05:31,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-06 19:05:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1919 transitions. [2021-12-06 19:05:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:05:31,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:31,573 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:31,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:05:31,573 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1669594221, now seen corresponding path program 1 times [2021-12-06 19:05:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:31,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829970532] [2021-12-06 19:05:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:31,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:31,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:31,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132170638] [2021-12-06 19:05:31,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:31,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:31,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:31,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:31,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:05:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:31,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:05:31,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:05:31,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:31,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:31,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829970532] [2021-12-06 19:05:31,908 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:31,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132170638] [2021-12-06 19:05:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132170638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:31,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:31,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:05:31,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817133670] [2021-12-06 19:05:31,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:31,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:05:31,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:31,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:05:31,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:05:31,911 INFO L87 Difference]: Start difference. First operand 1368 states and 1919 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:05:31,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:31,982 INFO L93 Difference]: Finished difference Result 2722 states and 3819 transitions. [2021-12-06 19:05:31,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:05:31,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2021-12-06 19:05:31,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:31,994 INFO L225 Difference]: With dead ends: 2722 [2021-12-06 19:05:31,994 INFO L226 Difference]: Without dead ends: 1368 [2021-12-06 19:05:32,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 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 19:05:32,001 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 971 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:32,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [971 Valid, 992 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-12-06 19:05:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2021-12-06 19:05:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1006 states have (on average 1.3528827037773359) internal successors, (1361), 1024 states have internal predecessors, (1361), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2021-12-06 19:05:32,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1918 transitions. [2021-12-06 19:05:32,059 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1918 transitions. Word has length 55 [2021-12-06 19:05:32,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:32,059 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1918 transitions. [2021-12-06 19:05:32,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:05:32,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1918 transitions. [2021-12-06 19:05:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 19:05:32,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:32,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:32,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:05:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:32,263 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 658476971, now seen corresponding path program 1 times [2021-12-06 19:05:32,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:32,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623257904] [2021-12-06 19:05:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:32,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:32,296 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:32,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401847838] [2021-12-06 19:05:32,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:32,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:32,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:32,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:32,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:05:32,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:32,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 19:05:32,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:05:32,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:32,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623257904] [2021-12-06 19:05:32,601 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401847838] [2021-12-06 19:05:32,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401847838] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:32,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:32,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:32,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926726416] [2021-12-06 19:05:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:32,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:32,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:32,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:32,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:32,604 INFO L87 Difference]: Start difference. First operand 1368 states and 1918 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:05:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:32,740 INFO L93 Difference]: Finished difference Result 4073 states and 5792 transitions. [2021-12-06 19:05:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:05:32,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2021-12-06 19:05:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:32,755 INFO L225 Difference]: With dead ends: 4073 [2021-12-06 19:05:32,755 INFO L226 Difference]: Without dead ends: 2695 [2021-12-06 19:05:32,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:05:32,761 INFO L933 BasicCegarLoop]: 1236 mSDtfsCounter, 975 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 4706 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:32,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [975 Valid, 4706 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:32,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-12-06 19:05:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2687. [2021-12-06 19:05:32,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2687 states, 1975 states have (on average 1.3544303797468353) internal successors, (2675), 2011 states have internal predecessors, (2675), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2021-12-06 19:05:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 3824 transitions. [2021-12-06 19:05:32,883 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 3824 transitions. Word has length 55 [2021-12-06 19:05:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:32,883 INFO L470 AbstractCegarLoop]: Abstraction has 2687 states and 3824 transitions. [2021-12-06 19:05:32,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 19:05:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 3824 transitions. [2021-12-06 19:05:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 19:05:32,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:32,890 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:32,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:05:33,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:33,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1631345663, now seen corresponding path program 1 times [2021-12-06 19:05:33,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429202866] [2021-12-06 19:05:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:33,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:33,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:05:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 19:05:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 19:05:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:05:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:05:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-06 19:05:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:33,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:05:33,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:33,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429202866] [2021-12-06 19:05:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429202866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:33,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:33,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:33,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780332270] [2021-12-06 19:05:33,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:33,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:33,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:33,228 INFO L87 Difference]: Start difference. First operand 2687 states and 3824 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:05:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:34,938 INFO L93 Difference]: Finished difference Result 8119 states and 11688 transitions. [2021-12-06 19:05:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:05:34,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2021-12-06 19:05:34,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:34,977 INFO L225 Difference]: With dead ends: 8119 [2021-12-06 19:05:34,978 INFO L226 Difference]: Without dead ends: 5446 [2021-12-06 19:05:34,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:05:34,990 INFO L933 BasicCegarLoop]: 1059 mSDtfsCounter, 1564 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 2643 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:34,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 2643 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 19:05:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2021-12-06 19:05:35,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 4985. [2021-12-06 19:05:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4985 states, 3692 states have (on average 1.3518418201516793) internal successors, (4991), 3761 states have internal predecessors, (4991), 948 states have call successors, (948), 313 states have call predecessors, (948), 344 states have return successors, (1110), 958 states have call predecessors, (1110), 947 states have call successors, (1110) [2021-12-06 19:05:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4985 states to 4985 states and 7049 transitions. [2021-12-06 19:05:35,222 INFO L78 Accepts]: Start accepts. Automaton has 4985 states and 7049 transitions. Word has length 89 [2021-12-06 19:05:35,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:35,223 INFO L470 AbstractCegarLoop]: Abstraction has 4985 states and 7049 transitions. [2021-12-06 19:05:35,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-06 19:05:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4985 states and 7049 transitions. [2021-12-06 19:05:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-06 19:05:35,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:35,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:35,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:05:35,229 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:35,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1995914462, now seen corresponding path program 1 times [2021-12-06 19:05:35,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:35,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919762626] [2021-12-06 19:05:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:35,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:05:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 19:05:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 19:05:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:05:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:05:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 19:05:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-06 19:05:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-06 19:05:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 19:05:35,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919762626] [2021-12-06 19:05:35,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919762626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:35,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:35,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:35,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916178791] [2021-12-06 19:05:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:35,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:35,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:35,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:35,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:35,400 INFO L87 Difference]: Start difference. First operand 4985 states and 7049 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:05:37,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:37,020 INFO L93 Difference]: Finished difference Result 14213 states and 20186 transitions. [2021-12-06 19:05:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:05:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 99 [2021-12-06 19:05:37,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:37,071 INFO L225 Difference]: With dead ends: 14213 [2021-12-06 19:05:37,071 INFO L226 Difference]: Without dead ends: 9242 [2021-12-06 19:05:37,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 19:05:37,085 INFO L933 BasicCegarLoop]: 1064 mSDtfsCounter, 1490 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 2627 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:37,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1573 Valid, 2627 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 19:05:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2021-12-06 19:05:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 8517. [2021-12-06 19:05:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8517 states, 6326 states have (on average 1.346190325640215) internal successors, (8516), 6455 states have internal predecessors, (8516), 1552 states have call successors, (1552), 575 states have call predecessors, (1552), 638 states have return successors, (1841), 1562 states have call predecessors, (1841), 1551 states have call successors, (1841) [2021-12-06 19:05:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 11909 transitions. [2021-12-06 19:05:37,392 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 11909 transitions. Word has length 99 [2021-12-06 19:05:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:37,393 INFO L470 AbstractCegarLoop]: Abstraction has 8517 states and 11909 transitions. [2021-12-06 19:05:37,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-06 19:05:37,393 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 11909 transitions. [2021-12-06 19:05:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 19:05:37,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:37,401 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:37,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:05:37,425 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:37,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1464423004, now seen corresponding path program 1 times [2021-12-06 19:05:37,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:37,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681075125] [2021-12-06 19:05:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:37,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 19:05:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 19:05:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-06 19:05:37,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-06 19:05:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-06 19:05:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-06 19:05:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-06 19:05:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-06 19:05:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 19:05:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-06 19:05:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-06 19:05:37,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:37,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681075125] [2021-12-06 19:05:37,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681075125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:37,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:37,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:37,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433699121] [2021-12-06 19:05:37,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:37,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:37,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:37,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:37,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:37,613 INFO L87 Difference]: Start difference. First operand 8517 states and 11909 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:38,933 INFO L93 Difference]: Finished difference Result 22537 states and 31728 transitions. [2021-12-06 19:05:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:05:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2021-12-06 19:05:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:38,990 INFO L225 Difference]: With dead ends: 22537 [2021-12-06 19:05:38,990 INFO L226 Difference]: Without dead ends: 14034 [2021-12-06 19:05:39,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:05:39,010 INFO L933 BasicCegarLoop]: 1331 mSDtfsCounter, 1208 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 601 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1298 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 601 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:39,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1298 Valid, 2710 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [601 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 19:05:39,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14034 states. [2021-12-06 19:05:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14034 to 12847. [2021-12-06 19:05:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12847 states, 9466 states have (on average 1.3322417071624761) internal successors, (12611), 9666 states have internal predecessors, (12611), 2330 states have call successors, (2330), 943 states have call predecessors, (2330), 1050 states have return successors, (2831), 2357 states have call predecessors, (2831), 2329 states have call successors, (2831) [2021-12-06 19:05:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12847 states to 12847 states and 17772 transitions. [2021-12-06 19:05:39,521 INFO L78 Accepts]: Start accepts. Automaton has 12847 states and 17772 transitions. Word has length 118 [2021-12-06 19:05:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:39,521 INFO L470 AbstractCegarLoop]: Abstraction has 12847 states and 17772 transitions. [2021-12-06 19:05:39,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 12847 states and 17772 transitions. [2021-12-06 19:05:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 19:05:39,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:39,530 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:05:39,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1872959109, now seen corresponding path program 1 times [2021-12-06 19:05:39,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:39,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413183786] [2021-12-06 19:05:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:39,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:39,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:39,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344057222] [2021-12-06 19:05:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:39,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:39,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:39,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:39,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 19:05:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:05:39,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-06 19:05:39,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:39,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:39,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413183786] [2021-12-06 19:05:39,885 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:39,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344057222] [2021-12-06 19:05:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344057222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:39,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:39,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:05:39,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561557173] [2021-12-06 19:05:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:05:39,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:05:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:05:39,887 INFO L87 Difference]: Start difference. First operand 12847 states and 17772 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:05:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:40,311 INFO L93 Difference]: Finished difference Result 33105 states and 45688 transitions. [2021-12-06 19:05:40,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:05:40,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2021-12-06 19:05:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:40,363 INFO L225 Difference]: With dead ends: 33105 [2021-12-06 19:05:40,364 INFO L226 Difference]: Without dead ends: 20283 [2021-12-06 19:05:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 19:05:40,391 INFO L933 BasicCegarLoop]: 1142 mSDtfsCounter, 941 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:40,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 2063 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:40,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-12-06 19:05:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 20270. [2021-12-06 19:05:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20270 states, 14946 states have (on average 1.3285828984343637) internal successors, (19857), 15275 states have internal predecessors, (19857), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-06 19:05:41,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20270 states to 20270 states and 27838 transitions. [2021-12-06 19:05:41,115 INFO L78 Accepts]: Start accepts. Automaton has 20270 states and 27838 transitions. Word has length 123 [2021-12-06 19:05:41,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:41,115 INFO L470 AbstractCegarLoop]: Abstraction has 20270 states and 27838 transitions. [2021-12-06 19:05:41,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 19:05:41,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20270 states and 27838 transitions. [2021-12-06 19:05:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-06 19:05:41,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:41,125 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:41,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 19:05:41,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 19:05:41,326 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 546342467, now seen corresponding path program 1 times [2021-12-06 19:05:41,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457208496] [2021-12-06 19:05:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:41,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:41,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:41,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50042764] [2021-12-06 19:05:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:41,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:41,349 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:41,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 19:05:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1176 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:05:41,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-06 19:05:41,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:41,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:41,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457208496] [2021-12-06 19:05:41,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:41,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50042764] [2021-12-06 19:05:41,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50042764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:41,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:41,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:05:41,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414687282] [2021-12-06 19:05:41,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:41,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:05:41,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:41,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:05:41,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:05:41,683 INFO L87 Difference]: Start difference. First operand 20270 states and 27838 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:42,106 INFO L93 Difference]: Finished difference Result 30962 states and 42975 transitions. [2021-12-06 19:05:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:05:42,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2021-12-06 19:05:42,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:42,179 INFO L225 Difference]: With dead ends: 30962 [2021-12-06 19:05:42,179 INFO L226 Difference]: Without dead ends: 20314 [2021-12-06 19:05:42,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 19:05:42,199 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 5 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:42,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1990 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20314 states. [2021-12-06 19:05:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20314 to 20314. [2021-12-06 19:05:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20314 states, 14990 states have (on average 1.32761841227485) internal successors, (19901), 15319 states have internal predecessors, (19901), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-06 19:05:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20314 states to 20314 states and 27882 transitions. [2021-12-06 19:05:42,856 INFO L78 Accepts]: Start accepts. Automaton has 20314 states and 27882 transitions. Word has length 123 [2021-12-06 19:05:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:42,856 INFO L470 AbstractCegarLoop]: Abstraction has 20314 states and 27882 transitions. [2021-12-06 19:05:42,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 20314 states and 27882 transitions. [2021-12-06 19:05:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-06 19:05:42,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:42,865 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:42,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 19:05:43,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:43,065 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:43,066 INFO L85 PathProgramCache]: Analyzing trace with hash -756774844, now seen corresponding path program 1 times [2021-12-06 19:05:43,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:43,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682218079] [2021-12-06 19:05:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:43,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:43,086 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:43,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734892117] [2021-12-06 19:05:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:43,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:43,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:43,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:43,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 19:05:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 1184 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:05:43,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 19:05:43,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:43,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:43,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682218079] [2021-12-06 19:05:43,406 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734892117] [2021-12-06 19:05:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734892117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:43,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:43,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:05:43,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255826227] [2021-12-06 19:05:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:43,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:05:43,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:05:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:05:43,408 INFO L87 Difference]: Start difference. First operand 20314 states and 27882 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:43,857 INFO L93 Difference]: Finished difference Result 40681 states and 55847 transitions. [2021-12-06 19:05:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:05:43,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2021-12-06 19:05:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:43,915 INFO L225 Difference]: With dead ends: 40681 [2021-12-06 19:05:43,915 INFO L226 Difference]: Without dead ends: 20356 [2021-12-06 19:05:43,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 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 19:05:43,946 INFO L933 BasicCegarLoop]: 1002 mSDtfsCounter, 12 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2994 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:43,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 2994 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:43,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20356 states. [2021-12-06 19:05:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20356 to 20317. [2021-12-06 19:05:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20317 states, 14993 states have (on average 1.3267524844927634) internal successors, (19892), 15322 states have internal predecessors, (19892), 3627 states have call successors, (3627), 1509 states have call predecessors, (3627), 1696 states have return successors, (4354), 3685 states have call predecessors, (4354), 3626 states have call successors, (4354) [2021-12-06 19:05:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20317 states to 20317 states and 27873 transitions. [2021-12-06 19:05:44,489 INFO L78 Accepts]: Start accepts. Automaton has 20317 states and 27873 transitions. Word has length 125 [2021-12-06 19:05:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:44,490 INFO L470 AbstractCegarLoop]: Abstraction has 20317 states and 27873 transitions. [2021-12-06 19:05:44,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-06 19:05:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20317 states and 27873 transitions. [2021-12-06 19:05:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 19:05:44,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:44,497 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:44,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 19:05:44,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:44,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1089324516, now seen corresponding path program 1 times [2021-12-06 19:05:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:44,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001404628] [2021-12-06 19:05:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:44,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:44,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:44,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826888225] [2021-12-06 19:05:44,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:44,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:44,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:44,721 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:44,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 19:05:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:44,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 19:05:44,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 19:05:45,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:45,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:45,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001404628] [2021-12-06 19:05:45,081 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:45,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826888225] [2021-12-06 19:05:45,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826888225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:45,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:45,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 19:05:45,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323272271] [2021-12-06 19:05:45,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:45,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:05:45,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:05:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:05:45,083 INFO L87 Difference]: Start difference. First operand 20317 states and 27873 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:05:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:46,963 INFO L93 Difference]: Finished difference Result 42109 states and 58238 transitions. [2021-12-06 19:05:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 19:05:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2021-12-06 19:05:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:47,024 INFO L225 Difference]: With dead ends: 42109 [2021-12-06 19:05:47,024 INFO L226 Difference]: Without dead ends: 21817 [2021-12-06 19:05:47,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:05:47,068 INFO L933 BasicCegarLoop]: 1033 mSDtfsCounter, 1283 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 2857 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:47,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 2857 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:05:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21817 states. [2021-12-06 19:05:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21817 to 20019. [2021-12-06 19:05:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20019 states, 14731 states have (on average 1.3226529088317154) internal successors, (19484), 15038 states have internal predecessors, (19484), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2021-12-06 19:05:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 27137 transitions. [2021-12-06 19:05:47,800 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 27137 transitions. Word has length 126 [2021-12-06 19:05:47,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:47,801 INFO L470 AbstractCegarLoop]: Abstraction has 20019 states and 27137 transitions. [2021-12-06 19:05:47,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-06 19:05:47,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 27137 transitions. [2021-12-06 19:05:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 19:05:47,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:47,809 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:47,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 19:05:48,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 19:05:48,011 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 537022152, now seen corresponding path program 1 times [2021-12-06 19:05:48,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:48,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981320295] [2021-12-06 19:05:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:48,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:48,065 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:48,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933914262] [2021-12-06 19:05:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:48,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:48,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:48,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:48,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 19:05:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:05:48,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:48,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:48,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981320295] [2021-12-06 19:05:48,402 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:48,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933914262] [2021-12-06 19:05:48,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933914262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:48,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:48,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:05:48,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287151203] [2021-12-06 19:05:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:48,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:05:48,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:05:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:05:48,403 INFO L87 Difference]: Start difference. First operand 20019 states and 27137 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:05:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:48,988 INFO L93 Difference]: Finished difference Result 20236 states and 27431 transitions. [2021-12-06 19:05:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:05:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 135 [2021-12-06 19:05:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:49,033 INFO L225 Difference]: With dead ends: 20236 [2021-12-06 19:05:49,033 INFO L226 Difference]: Without dead ends: 20187 [2021-12-06 19:05:49,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:05:49,042 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 941 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:49,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 1685 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 19:05:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20187 states. [2021-12-06 19:05:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20187 to 20031. [2021-12-06 19:05:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20031 states, 14743 states have (on average 1.3223902869158244) internal successors, (19496), 15050 states have internal predecessors, (19496), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2021-12-06 19:05:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20031 states to 20031 states and 27149 transitions. [2021-12-06 19:05:49,614 INFO L78 Accepts]: Start accepts. Automaton has 20031 states and 27149 transitions. Word has length 135 [2021-12-06 19:05:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:49,614 INFO L470 AbstractCegarLoop]: Abstraction has 20031 states and 27149 transitions. [2021-12-06 19:05:49,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:05:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 20031 states and 27149 transitions. [2021-12-06 19:05:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-06 19:05:49,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:49,623 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:49,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 19:05:49,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 19:05:49,825 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:49,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:49,826 INFO L85 PathProgramCache]: Analyzing trace with hash -134402856, now seen corresponding path program 1 times [2021-12-06 19:05:49,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:49,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34251251] [2021-12-06 19:05:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:49,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:49,862 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:49,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931417991] [2021-12-06 19:05:49,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:49,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:49,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:49,863 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:49,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 19:05:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:50,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:05:50,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 19:05:50,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:50,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:50,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34251251] [2021-12-06 19:05:50,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:50,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931417991] [2021-12-06 19:05:50,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931417991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:50,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:50,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:05:50,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467246334] [2021-12-06 19:05:50,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:50,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:05:50,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:50,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:05:50,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:05:50,220 INFO L87 Difference]: Start difference. First operand 20031 states and 27149 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 19:05:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:50,510 INFO L93 Difference]: Finished difference Result 30016 states and 40705 transitions. [2021-12-06 19:05:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:05:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 137 [2021-12-06 19:05:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:50,532 INFO L225 Difference]: With dead ends: 30016 [2021-12-06 19:05:50,532 INFO L226 Difference]: Without dead ends: 9721 [2021-12-06 19:05:50,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 19:05:50,561 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 896 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:50,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 1118 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9721 states. [2021-12-06 19:05:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9721 to 9721. [2021-12-06 19:05:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9721 states, 7136 states have (on average 1.3185257847533631) internal successors, (9409), 7292 states have internal predecessors, (9409), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2021-12-06 19:05:50,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9721 states to 9721 states and 13152 transitions. [2021-12-06 19:05:50,823 INFO L78 Accepts]: Start accepts. Automaton has 9721 states and 13152 transitions. Word has length 137 [2021-12-06 19:05:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:50,824 INFO L470 AbstractCegarLoop]: Abstraction has 9721 states and 13152 transitions. [2021-12-06 19:05:50,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-06 19:05:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 9721 states and 13152 transitions. [2021-12-06 19:05:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-06 19:05:50,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:50,830 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:50,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-06 19:05:51,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 19:05:51,032 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:51,033 INFO L85 PathProgramCache]: Analyzing trace with hash -472126265, now seen corresponding path program 1 times [2021-12-06 19:05:51,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:51,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917258892] [2021-12-06 19:05:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:51,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:51,081 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680332119] [2021-12-06 19:05:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:51,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:51,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:51,082 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:51,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 19:05:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:51,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 19:05:51,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:51,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:05:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:51,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:51,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917258892] [2021-12-06 19:05:51,578 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:51,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680332119] [2021-12-06 19:05:51,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680332119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:05:51,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:05:51,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-12-06 19:05:51,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255536333] [2021-12-06 19:05:51,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:05:51,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 19:05:51,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:51,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 19:05:51,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 19:05:51,579 INFO L87 Difference]: Start difference. First operand 9721 states and 13152 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:05:52,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:52,223 INFO L93 Difference]: Finished difference Result 10274 states and 13938 transitions. [2021-12-06 19:05:52,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:05:52,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 139 [2021-12-06 19:05:52,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:52,244 INFO L225 Difference]: With dead ends: 10274 [2021-12-06 19:05:52,244 INFO L226 Difference]: Without dead ends: 10225 [2021-12-06 19:05:52,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:05:52,248 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1043 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 2379 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:52,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1051 Valid, 2379 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 19:05:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10225 states. [2021-12-06 19:05:52,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10225 to 10225. [2021-12-06 19:05:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10225 states, 7514 states have (on average 1.3120841096619644) internal successors, (9859), 7688 states have internal predecessors, (9859), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 772 states have return successors, (2057), 1896 states have call predecessors, (2057), 1937 states have call successors, (2057) [2021-12-06 19:05:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10225 states to 10225 states and 13854 transitions. [2021-12-06 19:05:52,521 INFO L78 Accepts]: Start accepts. Automaton has 10225 states and 13854 transitions. Word has length 139 [2021-12-06 19:05:52,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:52,521 INFO L470 AbstractCegarLoop]: Abstraction has 10225 states and 13854 transitions. [2021-12-06 19:05:52,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:05:52,522 INFO L276 IsEmpty]: Start isEmpty. Operand 10225 states and 13854 transitions. [2021-12-06 19:05:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-06 19:05:52,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:52,531 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:52,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 19:05:52,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 19:05:52,732 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash -292548597, now seen corresponding path program 1 times [2021-12-06 19:05:52,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:52,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520618746] [2021-12-06 19:05:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:52,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:52,785 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:52,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238721533] [2021-12-06 19:05:52,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:52,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:52,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:52,787 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:52,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 19:05:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 19:05:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:53,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:05:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:53,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520618746] [2021-12-06 19:05:53,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:53,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238721533] [2021-12-06 19:05:53,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238721533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:05:53,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:05:53,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-12-06 19:05:53,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451332610] [2021-12-06 19:05:53,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:05:53,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 19:05:53,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:53,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 19:05:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:05:53,347 INFO L87 Difference]: Start difference. First operand 10225 states and 13854 transitions. Second operand has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:05:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:54,310 INFO L93 Difference]: Finished difference Result 11282 states and 15378 transitions. [2021-12-06 19:05:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:05:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 149 [2021-12-06 19:05:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:54,334 INFO L225 Difference]: With dead ends: 11282 [2021-12-06 19:05:54,334 INFO L226 Difference]: Without dead ends: 11233 [2021-12-06 19:05:54,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2021-12-06 19:05:54,339 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1880 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1900 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1900 Valid, 3158 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 19:05:54,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11233 states. [2021-12-06 19:05:54,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11233 to 11233. [2021-12-06 19:05:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11233 states, 8270 states have (on average 1.3009673518742442) internal successors, (10759), 8480 states have internal predecessors, (10759), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 772 states have return successors, (2309), 2112 states have call predecessors, (2309), 2189 states have call successors, (2309) [2021-12-06 19:05:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11233 states to 11233 states and 15258 transitions. [2021-12-06 19:05:54,719 INFO L78 Accepts]: Start accepts. Automaton has 11233 states and 15258 transitions. Word has length 149 [2021-12-06 19:05:54,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:54,720 INFO L470 AbstractCegarLoop]: Abstraction has 11233 states and 15258 transitions. [2021-12-06 19:05:54,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.357142857142858) internal successors, (173), 14 states have internal predecessors, (173), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2021-12-06 19:05:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 11233 states and 15258 transitions. [2021-12-06 19:05:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-06 19:05:54,739 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:54,740 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:54,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 19:05:54,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 19:05:54,941 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1905744190, now seen corresponding path program 2 times [2021-12-06 19:05:54,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:54,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232514061] [2021-12-06 19:05:54,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:54,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:55,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:55,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122886641] [2021-12-06 19:05:55,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:05:55,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:55,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:55,003 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:55,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 19:05:55,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:05:55,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:05:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 19:05:55,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-12-06 19:05:55,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:55,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232514061] [2021-12-06 19:05:55,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122886641] [2021-12-06 19:05:55,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122886641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:55,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:55,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:05:55,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456994170] [2021-12-06 19:05:55,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:55,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:05:55,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:55,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:05:55,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:55,353 INFO L87 Difference]: Start difference. First operand 11233 states and 15258 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:05:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:55,716 INFO L93 Difference]: Finished difference Result 22510 states and 30816 transitions. [2021-12-06 19:05:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:05:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 175 [2021-12-06 19:05:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:55,744 INFO L225 Difference]: With dead ends: 22510 [2021-12-06 19:05:55,744 INFO L226 Difference]: Without dead ends: 11355 [2021-12-06 19:05:55,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:05:55,766 INFO L933 BasicCegarLoop]: 995 mSDtfsCounter, 2 mSDsluCounter, 2980 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3975 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:55,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3975 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:05:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11355 states. [2021-12-06 19:05:56,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11355 to 11313. [2021-12-06 19:05:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11313 states, 8330 states have (on average 1.2987995198079232) internal successors, (10819), 8540 states have internal predecessors, (10819), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 792 states have return successors, (2338), 2132 states have call predecessors, (2338), 2189 states have call successors, (2338) [2021-12-06 19:05:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11313 states to 11313 states and 15347 transitions. [2021-12-06 19:05:56,177 INFO L78 Accepts]: Start accepts. Automaton has 11313 states and 15347 transitions. Word has length 175 [2021-12-06 19:05:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:56,178 INFO L470 AbstractCegarLoop]: Abstraction has 11313 states and 15347 transitions. [2021-12-06 19:05:56,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-06 19:05:56,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11313 states and 15347 transitions. [2021-12-06 19:05:56,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 19:05:56,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:56,194 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:56,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 19:05:56,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:56,395 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:56,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash -535217326, now seen corresponding path program 1 times [2021-12-06 19:05:56,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:56,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416287501] [2021-12-06 19:05:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:56,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:56,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:56,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690476400] [2021-12-06 19:05:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:56,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:56,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:56,432 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:56,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 19:05:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:05:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 19:05:56,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:56,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:05:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:05:57,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:57,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416287501] [2021-12-06 19:05:57,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:57,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690476400] [2021-12-06 19:05:57,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690476400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:05:57,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:05:57,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-12-06 19:05:57,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957930444] [2021-12-06 19:05:57,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:05:57,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:05:57,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:57,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:05:57,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:05:57,259 INFO L87 Difference]: Start difference. First operand 11313 states and 15347 transitions. Second operand has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:05:58,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:05:58,638 INFO L93 Difference]: Finished difference Result 13378 states and 18347 transitions. [2021-12-06 19:05:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 19:05:58,639 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 182 [2021-12-06 19:05:58,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:05:58,667 INFO L225 Difference]: With dead ends: 13378 [2021-12-06 19:05:58,667 INFO L226 Difference]: Without dead ends: 13329 [2021-12-06 19:05:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 19:05:58,673 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1562 mSDsluCounter, 3099 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 4082 SdHoareTripleChecker+Invalid, 1846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 19:05:58,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1606 Valid, 4082 Invalid, 1846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 19:05:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13329 states. [2021-12-06 19:05:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13329 to 13329. [2021-12-06 19:05:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13329 states, 9842 states have (on average 1.2821580979475717) internal successors, (12619), 10124 states have internal predecessors, (12619), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 792 states have return successors, (2842), 2564 states have call predecessors, (2842), 2693 states have call successors, (2842) [2021-12-06 19:05:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13329 states to 13329 states and 18155 transitions. [2021-12-06 19:05:59,055 INFO L78 Accepts]: Start accepts. Automaton has 13329 states and 18155 transitions. Word has length 182 [2021-12-06 19:05:59,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:05:59,055 INFO L470 AbstractCegarLoop]: Abstraction has 13329 states and 18155 transitions. [2021-12-06 19:05:59,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.115384615384615) internal successors, (237), 26 states have internal predecessors, (237), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:05:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 13329 states and 18155 transitions. [2021-12-06 19:05:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-12-06 19:05:59,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:05:59,078 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:05:59,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 19:05:59,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 19:05:59,279 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:05:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:05:59,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1281005638, now seen corresponding path program 2 times [2021-12-06 19:05:59,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:05:59,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949261368] [2021-12-06 19:05:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:05:59,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:05:59,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:05:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123344059] [2021-12-06 19:05:59,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:05:59,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:05:59,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:05:59,317 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:05:59,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 19:05:59,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:05:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:05:59,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:05:59,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:05:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2021-12-06 19:05:59,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:05:59,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:05:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949261368] [2021-12-06 19:05:59,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:05:59,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123344059] [2021-12-06 19:05:59,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123344059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:05:59,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:05:59,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 19:05:59,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989606594] [2021-12-06 19:05:59,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:05:59,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:05:59,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:05:59,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:05:59,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:05:59,850 INFO L87 Difference]: Start difference. First operand 13329 states and 18155 transitions. Second operand has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:06:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:00,351 INFO L93 Difference]: Finished difference Result 26858 states and 36734 transitions. [2021-12-06 19:06:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:06:00,352 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 230 [2021-12-06 19:06:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:00,384 INFO L225 Difference]: With dead ends: 26858 [2021-12-06 19:06:00,384 INFO L226 Difference]: Without dead ends: 13607 [2021-12-06 19:06:00,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:06:00,408 INFO L933 BasicCegarLoop]: 1018 mSDtfsCounter, 20 mSDsluCounter, 13186 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14204 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:00,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 14204 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:06:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13607 states. [2021-12-06 19:06:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13607 to 13441. [2021-12-06 19:06:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13441 states, 9922 states have (on average 1.2770610763958878) internal successors, (12671), 10204 states have internal predecessors, (12671), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 824 states have return successors, (2898), 2596 states have call predecessors, (2898), 2693 states have call successors, (2898) [2021-12-06 19:06:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13441 states to 13441 states and 18263 transitions. [2021-12-06 19:06:00,800 INFO L78 Accepts]: Start accepts. Automaton has 13441 states and 18263 transitions. Word has length 230 [2021-12-06 19:06:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:00,800 INFO L470 AbstractCegarLoop]: Abstraction has 13441 states and 18263 transitions. [2021-12-06 19:06:00,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:06:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 13441 states and 18263 transitions. [2021-12-06 19:06:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 19:06:00,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:00,824 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:00,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 19:06:01,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 19:06:01,025 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:01,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1571722951, now seen corresponding path program 1 times [2021-12-06 19:06:01,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:01,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225325550] [2021-12-06 19:06:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:01,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:01,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589656221] [2021-12-06 19:06:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:01,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:01,080 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:01,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 19:06:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1501 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 19:06:01,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:06:01,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:06:02,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:02,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225325550] [2021-12-06 19:06:02,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:02,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589656221] [2021-12-06 19:06:02,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589656221] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:06:02,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:06:02,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2021-12-06 19:06:02,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626090679] [2021-12-06 19:06:02,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:06:02,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 19:06:02,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:02,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 19:06:02,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 19:06:02,652 INFO L87 Difference]: Start difference. First operand 13441 states and 18263 transitions. Second operand has 50 states, 50 states have (on average 6.58) internal successors, (329), 50 states have internal predecessors, (329), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:06:05,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:05,337 INFO L93 Difference]: Finished difference Result 17522 states and 24215 transitions. [2021-12-06 19:06:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 19:06:05,338 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.58) internal successors, (329), 50 states have internal predecessors, (329), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 228 [2021-12-06 19:06:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:05,374 INFO L225 Difference]: With dead ends: 17522 [2021-12-06 19:06:05,374 INFO L226 Difference]: Without dead ends: 17473 [2021-12-06 19:06:05,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 19:06:05,383 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 2227 mSDsluCounter, 3494 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2319 SdHoareTripleChecker+Valid, 4477 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:05,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2319 Valid, 4477 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 19:06:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states. [2021-12-06 19:06:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17473 to 17473. [2021-12-06 19:06:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17473 states, 12946 states have (on average 1.2568360883670633) internal successors, (16271), 13372 states have internal predecessors, (16271), 3702 states have call successors, (3702), 737 states have call predecessors, (3702), 824 states have return successors, (3906), 3460 states have call predecessors, (3906), 3701 states have call successors, (3906) [2021-12-06 19:06:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17473 states to 17473 states and 23879 transitions. [2021-12-06 19:06:05,922 INFO L78 Accepts]: Start accepts. Automaton has 17473 states and 23879 transitions. Word has length 228 [2021-12-06 19:06:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:05,923 INFO L470 AbstractCegarLoop]: Abstraction has 17473 states and 23879 transitions. [2021-12-06 19:06:05,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.58) internal successors, (329), 50 states have internal predecessors, (329), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:06:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17473 states and 23879 transitions. [2021-12-06 19:06:05,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-06 19:06:05,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:05,957 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:05,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 19:06:06,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 19:06:06,158 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:06,159 INFO L85 PathProgramCache]: Analyzing trace with hash -477522635, now seen corresponding path program 1 times [2021-12-06 19:06:06,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:06,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753815753] [2021-12-06 19:06:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:06,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:06,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:06,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225822491] [2021-12-06 19:06:06,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:06,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:06,220 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:06,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 19:06:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 19:06:06,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:06:07,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-06 19:06:10,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:10,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753815753] [2021-12-06 19:06:10,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225822491] [2021-12-06 19:06:10,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225822491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:06:10,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:06:10,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2021-12-06 19:06:10,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380608042] [2021-12-06 19:06:10,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:06:10,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-12-06 19:06:10,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-12-06 19:06:10,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2021-12-06 19:06:10,927 INFO L87 Difference]: Start difference. First operand 17473 states and 23879 transitions. Second operand has 98 states, 98 states have (on average 5.255102040816326) internal successors, (515), 98 states have internal predecessors, (515), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:06:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:22,372 INFO L93 Difference]: Finished difference Result 25586 states and 35735 transitions. [2021-12-06 19:06:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 19:06:22,373 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.255102040816326) internal successors, (515), 98 states have internal predecessors, (515), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 321 [2021-12-06 19:06:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:22,474 INFO L225 Difference]: With dead ends: 25586 [2021-12-06 19:06:22,474 INFO L226 Difference]: Without dead ends: 25537 [2021-12-06 19:06:22,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2021-12-06 19:06:22,486 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 4849 mSDsluCounter, 3693 mSDsCounter, 0 mSdLazyCounter, 2833 mSolverCounterSat, 2316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5037 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 5149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2316 IncrementalHoareTripleChecker+Valid, 2833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5037 Valid, 4676 Invalid, 5149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2316 Valid, 2833 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-06 19:06:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25537 states. [2021-12-06 19:06:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25537 to 25537. [2021-12-06 19:06:23,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25537 states, 18994 states have (on average 1.2357060124249764) internal successors, (23471), 19708 states have internal predecessors, (23471), 5718 states have call successors, (5718), 737 states have call predecessors, (5718), 824 states have return successors, (5922), 5188 states have call predecessors, (5922), 5717 states have call successors, (5922) [2021-12-06 19:06:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25537 states to 25537 states and 35111 transitions. [2021-12-06 19:06:23,267 INFO L78 Accepts]: Start accepts. Automaton has 25537 states and 35111 transitions. Word has length 321 [2021-12-06 19:06:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:23,267 INFO L470 AbstractCegarLoop]: Abstraction has 25537 states and 35111 transitions. [2021-12-06 19:06:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.255102040816326) internal successors, (515), 98 states have internal predecessors, (515), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2021-12-06 19:06:23,268 INFO L276 IsEmpty]: Start isEmpty. Operand 25537 states and 35111 transitions. [2021-12-06 19:06:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-12-06 19:06:23,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:23,321 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:23,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 19:06:23,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:23,523 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2021265147, now seen corresponding path program 2 times [2021-12-06 19:06:23,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075222343] [2021-12-06 19:06:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:23,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:23,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:23,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759067334] [2021-12-06 19:06:23,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:06:23,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:23,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:23,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:23,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 19:06:23,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 19:06:23,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:06:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-06 19:06:23,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 17709 trivial. 0 not checked. [2021-12-06 19:06:24,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:24,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:24,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075222343] [2021-12-06 19:06:24,251 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:24,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759067334] [2021-12-06 19:06:24,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759067334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:24,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:24,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-12-06 19:06:24,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100271894] [2021-12-06 19:06:24,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:24,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 19:06:24,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 19:06:24,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-12-06 19:06:24,253 INFO L87 Difference]: Start difference. First operand 25537 states and 35111 transitions. Second operand has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:06:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:25,062 INFO L93 Difference]: Finished difference Result 51194 states and 70470 transitions. [2021-12-06 19:06:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 19:06:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 513 [2021-12-06 19:06:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:25,123 INFO L225 Difference]: With dead ends: 51194 [2021-12-06 19:06:25,123 INFO L226 Difference]: Without dead ends: 25735 [2021-12-06 19:06:25,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-12-06 19:06:25,211 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 22 mSDsluCounter, 12182 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13201 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:25,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 13201 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:06:25,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25735 states. [2021-12-06 19:06:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25735 to 25569. [2021-12-06 19:06:25,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25569 states, 19026 states have (on average 1.2348890991275097) internal successors, (23495), 19724 states have internal predecessors, (23495), 5718 states have call successors, (5718), 737 states have call predecessors, (5718), 824 states have return successors, (5922), 5204 states have call predecessors, (5922), 5717 states have call successors, (5922) [2021-12-06 19:06:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25569 states to 25569 states and 35135 transitions. [2021-12-06 19:06:26,012 INFO L78 Accepts]: Start accepts. Automaton has 25569 states and 35135 transitions. Word has length 513 [2021-12-06 19:06:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:26,013 INFO L470 AbstractCegarLoop]: Abstraction has 25569 states and 35135 transitions. [2021-12-06 19:06:26,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2021-12-06 19:06:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25569 states and 35135 transitions. [2021-12-06 19:06:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-12-06 19:06:26,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:26,066 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:26,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 19:06:26,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:26,268 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2116764502, now seen corresponding path program 1 times [2021-12-06 19:06:26,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405915756] [2021-12-06 19:06:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:26,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:26,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549564593] [2021-12-06 19:06:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:26,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:26,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:26,331 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:26,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 19:06:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:26,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 2302 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:06:26,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 17664 trivial. 0 not checked. [2021-12-06 19:06:26,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:26,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405915756] [2021-12-06 19:06:26,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:26,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549564593] [2021-12-06 19:06:26,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549564593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:26,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:26,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:06:26,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730161684] [2021-12-06 19:06:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:06:26,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:06:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:06:26,994 INFO L87 Difference]: Start difference. First operand 25569 states and 35135 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 19:06:28,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:28,058 INFO L93 Difference]: Finished difference Result 63240 states and 86801 transitions. [2021-12-06 19:06:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:06:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 536 [2021-12-06 19:06:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:28,137 INFO L225 Difference]: With dead ends: 63240 [2021-12-06 19:06:28,137 INFO L226 Difference]: Without dead ends: 37749 [2021-12-06 19:06:28,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 534 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 19:06:28,176 INFO L933 BasicCegarLoop]: 1250 mSDtfsCounter, 828 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:28,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 2078 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:06:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37749 states. [2021-12-06 19:06:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37749 to 37736. [2021-12-06 19:06:29,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37736 states, 28113 states have (on average 1.2323835947782165) internal successors, (34646), 29141 states have internal predecessors, (34646), 8380 states have call successors, (8380), 1115 states have call predecessors, (8380), 1242 states have return successors, (8666), 7614 states have call predecessors, (8666), 8379 states have call successors, (8666) [2021-12-06 19:06:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37736 states to 37736 states and 51692 transitions. [2021-12-06 19:06:29,414 INFO L78 Accepts]: Start accepts. Automaton has 37736 states and 51692 transitions. Word has length 536 [2021-12-06 19:06:29,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:29,415 INFO L470 AbstractCegarLoop]: Abstraction has 37736 states and 51692 transitions. [2021-12-06 19:06:29,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-06 19:06:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 37736 states and 51692 transitions. [2021-12-06 19:06:29,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-12-06 19:06:29,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:29,498 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:29,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 19:06:29,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:29,700 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1285105389, now seen corresponding path program 1 times [2021-12-06 19:06:29,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510520978] [2021-12-06 19:06:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:29,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:29,769 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395921934] [2021-12-06 19:06:29,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:29,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:29,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:29,770 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:29,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 19:06:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:30,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:06:30,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17741 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 17696 trivial. 0 not checked. [2021-12-06 19:06:30,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:30,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510520978] [2021-12-06 19:06:30,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395921934] [2021-12-06 19:06:30,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395921934] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:30,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:30,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:06:30,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474066492] [2021-12-06 19:06:30,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:30,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:06:30,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:06:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:06:30,451 INFO L87 Difference]: Start difference. First operand 37736 states and 51692 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:06:32,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:32,391 INFO L93 Difference]: Finished difference Result 99496 states and 136210 transitions. [2021-12-06 19:06:32,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:06:32,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 549 [2021-12-06 19:06:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:32,534 INFO L225 Difference]: With dead ends: 99496 [2021-12-06 19:06:32,534 INFO L226 Difference]: Without dead ends: 61838 [2021-12-06 19:06:32,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 547 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 19:06:32,592 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 983 mSDsluCounter, 2497 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 4225 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:32,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 4225 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:06:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61838 states. [2021-12-06 19:06:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61838 to 54996. [2021-12-06 19:06:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54996 states, 40909 states have (on average 1.2300960668801486) internal successors, (50322), 42401 states have internal predecessors, (50322), 12208 states have call successors, (12208), 1671 states have call predecessors, (12208), 1878 states have return successors, (12666), 11122 states have call predecessors, (12666), 12207 states have call successors, (12666) [2021-12-06 19:06:34,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54996 states to 54996 states and 75196 transitions. [2021-12-06 19:06:34,686 INFO L78 Accepts]: Start accepts. Automaton has 54996 states and 75196 transitions. Word has length 549 [2021-12-06 19:06:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:34,687 INFO L470 AbstractCegarLoop]: Abstraction has 54996 states and 75196 transitions. [2021-12-06 19:06:34,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:06:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 54996 states and 75196 transitions. [2021-12-06 19:06:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-12-06 19:06:34,812 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:34,812 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:34,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 19:06:35,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:35,013 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -906830619, now seen corresponding path program 1 times [2021-12-06 19:06:35,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688894568] [2021-12-06 19:06:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:35,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:35,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960570508] [2021-12-06 19:06:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:35,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:35,085 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:35,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 19:06:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 2383 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 19:06:35,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 68 proven. 12 refuted. 0 times theorem prover too weak. 17653 trivial. 0 not checked. [2021-12-06 19:06:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:06:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17725 trivial. 0 not checked. [2021-12-06 19:06:36,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:36,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688894568] [2021-12-06 19:06:36,859 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:36,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960570508] [2021-12-06 19:06:36,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960570508] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 19:06:36,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 19:06:36,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 14 [2021-12-06 19:06:36,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223916686] [2021-12-06 19:06:36,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:36,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 19:06:36,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:36,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 19:06:36,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:06:36,861 INFO L87 Difference]: Start difference. First operand 54996 states and 75196 transitions. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-06 19:06:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:47,315 INFO L93 Difference]: Finished difference Result 261804 states and 366763 transitions. [2021-12-06 19:06:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 19:06:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 543 [2021-12-06 19:06:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:48,004 INFO L225 Difference]: With dead ends: 261804 [2021-12-06 19:06:48,004 INFO L226 Difference]: Without dead ends: 216459 [2021-12-06 19:06:48,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1094 GetRequests, 1071 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2021-12-06 19:06:48,123 INFO L933 BasicCegarLoop]: 1898 mSDtfsCounter, 4934 mSDsluCounter, 3965 mSDsCounter, 0 mSdLazyCounter, 3826 mSolverCounterSat, 1836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5087 SdHoareTripleChecker+Valid, 5863 SdHoareTripleChecker+Invalid, 5662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1836 IncrementalHoareTripleChecker+Valid, 3826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:48,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5087 Valid, 5863 Invalid, 5662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1836 Valid, 3826 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 19:06:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216459 states. [2021-12-06 19:06:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216459 to 98489. [2021-12-06 19:06:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98489 states, 73212 states have (on average 1.2216713107140906) internal successors, (89441), 76048 states have internal predecessors, (89441), 22108 states have call successors, (22108), 2507 states have call predecessors, (22108), 3168 states have return successors, (24170), 20250 states have call predecessors, (24170), 22107 states have call successors, (24170) [2021-12-06 19:06:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98489 states to 98489 states and 135719 transitions. [2021-12-06 19:06:54,374 INFO L78 Accepts]: Start accepts. Automaton has 98489 states and 135719 transitions. Word has length 543 [2021-12-06 19:06:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:06:54,375 INFO L470 AbstractCegarLoop]: Abstraction has 98489 states and 135719 transitions. [2021-12-06 19:06:54,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 states have internal predecessors, (107), 6 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-12-06 19:06:54,375 INFO L276 IsEmpty]: Start isEmpty. Operand 98489 states and 135719 transitions. [2021-12-06 19:06:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-12-06 19:06:54,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:06:54,616 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:06:54,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 19:06:54,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:54,818 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:06:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:06:54,819 INFO L85 PathProgramCache]: Analyzing trace with hash -518103129, now seen corresponding path program 1 times [2021-12-06 19:06:54,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:06:54,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058906260] [2021-12-06 19:06:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:54,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:06:54,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:06:54,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148543626] [2021-12-06 19:06:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:06:54,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:06:54,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:06:54,883 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:06:54,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 19:06:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:06:55,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 19:06:55,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:06:55,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17741 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 17696 trivial. 0 not checked. [2021-12-06 19:06:55,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:06:55,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:06:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058906260] [2021-12-06 19:06:55,524 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:06:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148543626] [2021-12-06 19:06:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148543626] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:06:55,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:06:55,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:06:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662315105] [2021-12-06 19:06:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:06:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:06:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:06:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:06:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:06:55,526 INFO L87 Difference]: Start difference. First operand 98489 states and 135719 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:06:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:06:59,529 INFO L93 Difference]: Finished difference Result 196930 states and 271400 transitions. [2021-12-06 19:06:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:06:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 551 [2021-12-06 19:06:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:06:59,789 INFO L225 Difference]: With dead ends: 196930 [2021-12-06 19:06:59,789 INFO L226 Difference]: Without dead ends: 98519 [2021-12-06 19:06:59,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 549 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 19:06:59,918 INFO L933 BasicCegarLoop]: 996 mSDtfsCounter, 0 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:06:59,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1987 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:06:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98519 states. [2021-12-06 19:07:04,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98519 to 98519. [2021-12-06 19:07:04,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98519 states, 73242 states have (on average 1.2215805139127822) internal successors, (89471), 76078 states have internal predecessors, (89471), 22108 states have call successors, (22108), 2507 states have call predecessors, (22108), 3168 states have return successors, (24170), 20250 states have call predecessors, (24170), 22107 states have call successors, (24170) [2021-12-06 19:07:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98519 states to 98519 states and 135749 transitions. [2021-12-06 19:07:04,825 INFO L78 Accepts]: Start accepts. Automaton has 98519 states and 135749 transitions. Word has length 551 [2021-12-06 19:07:04,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:04,825 INFO L470 AbstractCegarLoop]: Abstraction has 98519 states and 135749 transitions. [2021-12-06 19:07:04,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:07:04,825 INFO L276 IsEmpty]: Start isEmpty. Operand 98519 states and 135749 transitions. [2021-12-06 19:07:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2021-12-06 19:07:05,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:05,079 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:07:05,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 19:07:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:05,281 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:05,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:05,282 INFO L85 PathProgramCache]: Analyzing trace with hash -824449883, now seen corresponding path program 1 times [2021-12-06 19:07:05,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:07:05,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134047712] [2021-12-06 19:07:05,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:05,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:07:05,349 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:07:05,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449520814] [2021-12-06 19:07:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:05,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:05,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:07:05,350 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:07:05,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 19:07:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 2366 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:07:05,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17741 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 17696 trivial. 0 not checked. [2021-12-06 19:07:05,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:07:05,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:07:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134047712] [2021-12-06 19:07:05,986 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:07:05,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449520814] [2021-12-06 19:07:05,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449520814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:07:05,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:07:05,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:07:05,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279291526] [2021-12-06 19:07:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:07:05,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:07:05,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:07:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:07:05,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:07:05,987 INFO L87 Difference]: Start difference. First operand 98519 states and 135749 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:07:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:12,288 INFO L93 Difference]: Finished difference Result 238934 states and 329134 transitions. [2021-12-06 19:07:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:07:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 551 [2021-12-06 19:07:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:12,654 INFO L225 Difference]: With dead ends: 238934 [2021-12-06 19:07:12,654 INFO L226 Difference]: Without dead ends: 140493 [2021-12-06 19:07:12,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 549 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 19:07:12,907 INFO L933 BasicCegarLoop]: 1492 mSDtfsCounter, 983 mSDsluCounter, 2369 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 3861 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:12,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 3861 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:07:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140493 states. [2021-12-06 19:07:18,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140493 to 98519. [2021-12-06 19:07:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98519 states, 73242 states have (on average 1.2215805139127822) internal successors, (89471), 76078 states have internal predecessors, (89471), 22108 states have call successors, (22108), 2507 states have call predecessors, (22108), 3168 states have return successors, (24170), 20250 states have call predecessors, (24170), 22107 states have call successors, (24170) [2021-12-06 19:07:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98519 states to 98519 states and 135749 transitions. [2021-12-06 19:07:18,399 INFO L78 Accepts]: Start accepts. Automaton has 98519 states and 135749 transitions. Word has length 551 [2021-12-06 19:07:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:18,400 INFO L470 AbstractCegarLoop]: Abstraction has 98519 states and 135749 transitions. [2021-12-06 19:07:18,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-06 19:07:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 98519 states and 135749 transitions. [2021-12-06 19:07:18,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-12-06 19:07:18,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:18,653 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:07:18,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 19:07:18,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:18,855 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:18,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1664074381, now seen corresponding path program 1 times [2021-12-06 19:07:18,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:07:18,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050355689] [2021-12-06 19:07:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:18,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:07:18,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:07:18,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150147370] [2021-12-06 19:07:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:18,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:18,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:07:18,923 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:07:18,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 19:07:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 19:07:19,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 17725 trivial. 0 not checked. [2021-12-06 19:07:19,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 19:07:19,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:07:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050355689] [2021-12-06 19:07:19,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:07:19,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150147370] [2021-12-06 19:07:19,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150147370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:07:19,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:07:19,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 19:07:19,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429256100] [2021-12-06 19:07:19,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:07:19,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:07:19,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:07:19,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:07:19,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:07:19,559 INFO L87 Difference]: Start difference. First operand 98519 states and 135749 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 19:07:24,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:07:24,182 INFO L93 Difference]: Finished difference Result 187219 states and 259398 transitions. [2021-12-06 19:07:24,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:07:24,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 543 [2021-12-06 19:07:24,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:07:24,449 INFO L225 Difference]: With dead ends: 187219 [2021-12-06 19:07:24,449 INFO L226 Difference]: Without dead ends: 98521 [2021-12-06 19:07:24,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 540 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 19:07:24,581 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 13 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 2961 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:07:24,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 2961 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:07:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98521 states. [2021-12-06 19:07:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98521 to 98496. [2021-12-06 19:07:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98496 states, 73219 states have (on average 1.2210082082519564) internal successors, (89401), 76055 states have internal predecessors, (89401), 22108 states have call successors, (22108), 2507 states have call predecessors, (22108), 3168 states have return successors, (24170), 20250 states have call predecessors, (24170), 22107 states have call successors, (24170) [2021-12-06 19:07:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98496 states to 98496 states and 135679 transitions. [2021-12-06 19:07:29,949 INFO L78 Accepts]: Start accepts. Automaton has 98496 states and 135679 transitions. Word has length 543 [2021-12-06 19:07:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:07:29,950 INFO L470 AbstractCegarLoop]: Abstraction has 98496 states and 135679 transitions. [2021-12-06 19:07:29,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 19:07:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 98496 states and 135679 transitions. [2021-12-06 19:07:30,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-06 19:07:30,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:07:30,189 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:07:30,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 19:07:30,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 19:07:30,391 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:07:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:07:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1107307514, now seen corresponding path program 1 times [2021-12-06 19:07:30,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:07:30,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824858876] [2021-12-06 19:07:30,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:30,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:07:30,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:07:30,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878035554] [2021-12-06 19:07:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:07:30,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:07:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:07:30,439 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:07:30,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 19:07:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:07:30,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2382 conjuncts, 97 conjunts are in the unsatisfiable core [2021-12-06 19:07:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:07:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17735 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:07:33,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:08:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17735 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:08:15,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:08:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824858876] [2021-12-06 19:08:15,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 19:08:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878035554] [2021-12-06 19:08:15,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878035554] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:08:15,741 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 19:08:15,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 98] total 194 [2021-12-06 19:08:15,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124181691] [2021-12-06 19:08:15,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 19:08:15,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2021-12-06 19:08:15,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:08:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2021-12-06 19:08:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2021-12-06 19:08:15,758 INFO L87 Difference]: Start difference. First operand 98496 states and 135679 transitions. Second operand has 194 states, 194 states have (on average 4.84020618556701) internal successors, (939), 194 states have internal predecessors, (939), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-12-06 19:11:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:11:10,179 INFO L93 Difference]: Finished difference Result 165857 states and 234239 transitions. [2021-12-06 19:11:10,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-12-06 19:11:10,183 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.84020618556701) internal successors, (939), 194 states have internal predecessors, (939), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 542 [2021-12-06 19:11:10,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:11:10,594 INFO L225 Difference]: With dead ends: 165857 [2021-12-06 19:11:10,594 INFO L226 Difference]: Without dead ends: 165696 [2021-12-06 19:11:10,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1177 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 157.4s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2021-12-06 19:11:10,645 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 6823 mSDsluCounter, 7636 mSDsCounter, 0 mSdLazyCounter, 7620 mSolverCounterSat, 3782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7203 SdHoareTripleChecker+Valid, 8619 SdHoareTripleChecker+Invalid, 11402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3782 IncrementalHoareTripleChecker+Valid, 7620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:11:10,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7203 Valid, 8619 Invalid, 11402 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3782 Valid, 7620 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2021-12-06 19:11:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165696 states. [2021-12-06 19:11:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165696 to 165696. [2021-12-06 19:11:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165696 states, 123619 states have (on average 1.2085601727889725) internal successors, (149401), 128855 states have internal predecessors, (149401), 38908 states have call successors, (38908), 2507 states have call predecessors, (38908), 3168 states have return successors, (40970), 34650 states have call predecessors, (40970), 38907 states have call successors, (40970) [2021-12-06 19:11:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165696 states to 165696 states and 229279 transitions. [2021-12-06 19:11:19,788 INFO L78 Accepts]: Start accepts. Automaton has 165696 states and 229279 transitions. Word has length 542 [2021-12-06 19:11:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:11:19,788 INFO L470 AbstractCegarLoop]: Abstraction has 165696 states and 229279 transitions. [2021-12-06 19:11:19,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.84020618556701) internal successors, (939), 194 states have internal predecessors, (939), 4 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-12-06 19:11:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 165696 states and 229279 transitions. [2021-12-06 19:11:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2021-12-06 19:11:20,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:11:20,372 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 9, 9, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:11:20,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-06 19:11:20,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 19:11:20,573 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:11:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:11:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1850831770, now seen corresponding path program 2 times [2021-12-06 19:11:20,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:11:20,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16893235] [2021-12-06 19:11:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:11:20,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:11:20,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 19:11:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035278418] [2021-12-06 19:11:20,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 19:11:20,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:11:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:11:20,793 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:11:20,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae9694f0-3ac6-4f21-9119-0726e151a742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 19:11:21,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 19:11:21,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 19:11:21,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 3246 conjuncts, 193 conjunts are in the unsatisfiable core [2021-12-06 19:11:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:11:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 72167 backedges. 0 proven. 72010 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-12-06 19:11:31,494 INFO L328 TraceCheckSpWp]: Computing backward predicates...