./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:12:21,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:12:21,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:12:21,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:12:21,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:12:21,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:12:21,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:12:21,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:12:21,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:12:21,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:12:21,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:12:21,348 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:12:21,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:12:21,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:12:21,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:12:21,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:12:21,354 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:12:21,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:12:21,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:12:21,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:12:21,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:12:21,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:12:21,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:12:21,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:12:21,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:12:21,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:12:21,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:12:21,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:12:21,377 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:12:21,378 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:12:21,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:12:21,380 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:12:21,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:12:21,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:12:21,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:12:21,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:12:21,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:12:21,397 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:12:21,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:12:21,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:12:21,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:12:21,401 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:12:21,432 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:12:21,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:12:21,433 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:12:21,433 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:12:21,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:12:21,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:12:21,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:12:21,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:12:21,435 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:12:21,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:12:21,435 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:12:21,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:12:21,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:12:21,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:12:21,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:12:21,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:12:21,437 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:12:21,437 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:12:21,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:12:21,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:12:21,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:12:21,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:12:21,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:12:21,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:12:21,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:12:21,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:12:21,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:12:21,439 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:12:21,439 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:12:21,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:12:21,439 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:12:21,439 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:12:21,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:12:21,440 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:12:21,440 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_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7004d2b01bb7d5c4b1956f589017b61646e33c2f2be997467596b458e0de6322 [2021-11-20 06:12:21,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:12:21,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:12:21,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:12:21,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:12:21,722 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:12:21,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-11-20 06:12:21,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/data/3691a9f30/a279e3bbc38d49e2a5f306b26bb91ae6/FLAG53d03057a [2021-11-20 06:12:22,257 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:12:22,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c [2021-11-20 06:12:22,274 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/data/3691a9f30/a279e3bbc38d49e2a5f306b26bb91ae6/FLAG53d03057a [2021-11-20 06:12:22,634 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/data/3691a9f30/a279e3bbc38d49e2a5f306b26bb91ae6 [2021-11-20 06:12:22,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:12:22,638 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:12:22,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:12:22,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:12:22,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:12:22,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:22,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb3cc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22, skipping insertion in model container [2021-11-20 06:12:22,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:22,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:12:22,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:12:22,913 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_7fc1852b-9068-462d-9f70-1e844944c3a8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2021-11-20 06:12:22,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:12:22,945 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:12:22,960 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_7fc1852b-9068-462d-9f70-1e844944c3a8/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound20.c[490,503] [2021-11-20 06:12:22,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:12:22,987 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:12:22,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22 WrapperNode [2021-11-20 06:12:22,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:12:22,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:12:22,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:12:22,990 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:12:22,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,038 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2021-11-20 06:12:23,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:12:23,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:12:23,040 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:12:23,040 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:12:23,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,086 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:12:23,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:12:23,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:12:23,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:12:23,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (1/1) ... [2021-11-20 06:12:23,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:12:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:23,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:12:23,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:12:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:12:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:12:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:12:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:12:23,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:12:23,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:12:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:12:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:12:23,275 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:12:23,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:12:23,522 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:12:23,529 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:12:23,529 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:12:23,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:12:23 BoogieIcfgContainer [2021-11-20 06:12:23,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:12:23,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:12:23,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:12:23,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:12:23,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:12:22" (1/3) ... [2021-11-20 06:12:23,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0fc425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:12:23, skipping insertion in model container [2021-11-20 06:12:23,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:12:22" (2/3) ... [2021-11-20 06:12:23,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f0fc425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:12:23, skipping insertion in model container [2021-11-20 06:12:23,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:12:23" (3/3) ... [2021-11-20 06:12:23,541 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound20.c [2021-11-20 06:12:23,547 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:12:23,548 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:12:23,613 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:12:23,637 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:12:23,637 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:12:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:12:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:12:23,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:23,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:23,688 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2021-11-20 06:12:23,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023173210] [2021-11-20 06:12:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:23,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:12:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:23,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:12:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:23,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:23,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023173210] [2021-11-20 06:12:23,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023173210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:23,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:23,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:12:23,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765629541] [2021-11-20 06:12:23,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:23,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:12:23,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:12:23,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:23,933 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:12:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:23,982 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2021-11-20 06:12:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:12:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 06:12:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:23,993 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:12:23,993 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:12:23,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:12:24,018 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:24,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:12:24,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:12:24,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:12:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-20 06:12:24,065 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2021-11-20 06:12:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:24,066 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-20 06:12:24,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:12:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-20 06:12:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:12:24,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:24,069 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:24,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:12:24,069 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:24,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:24,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2021-11-20 06:12:24,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:24,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826284526] [2021-11-20 06:12:24,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:24,097 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:24,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289100189] [2021-11-20 06:12:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:24,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:24,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:24,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:12:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:24,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:12:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:24,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:24,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:24,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826284526] [2021-11-20 06:12:24,315 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:24,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289100189] [2021-11-20 06:12:24,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289100189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:24,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:24,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:12:24,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314536843] [2021-11-20 06:12:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:24,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:12:24,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:12:24,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:24,320 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:24,346 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-20 06:12:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:12:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 06:12:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:24,349 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:12:24,349 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:12:24,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:12:24,352 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:24,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:12:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 06:12:24,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:12:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-20 06:12:24,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-11-20 06:12:24,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:24,369 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-20 06:12:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-20 06:12:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:12:24,370 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:24,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:24,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:24,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:24,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:24,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:24,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2021-11-20 06:12:24,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823648868] [2021-11-20 06:12:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:24,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:24,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:24,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401262371] [2021-11-20 06:12:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:24,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:24,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:24,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:12:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:24,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:12:24,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:24,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:24,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:24,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823648868] [2021-11-20 06:12:24,807 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401262371] [2021-11-20 06:12:24,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401262371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:24,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:24,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:12:24,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879544162] [2021-11-20 06:12:24,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:24,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:12:24,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:24,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:12:24,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:24,818 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:24,923 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-11-20 06:12:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:12:24,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-20 06:12:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:24,926 INFO L225 Difference]: With dead ends: 53 [2021-11-20 06:12:24,926 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 06:12:24,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:24,928 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:24,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 06:12:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-11-20 06:12:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:12:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-20 06:12:24,940 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2021-11-20 06:12:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-20 06:12:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-20 06:12:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:12:24,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:24,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:24,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:25,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:25,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:25,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:25,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2021-11-20 06:12:25,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339474603] [2021-11-20 06:12:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:25,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:25,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206525461] [2021-11-20 06:12:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:25,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:25,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:25,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:25,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:12:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:25,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:12:25,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:25,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:25,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339474603] [2021-11-20 06:12:25,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:25,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206525461] [2021-11-20 06:12:25,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206525461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:25,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:25,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:12:25,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911912830] [2021-11-20 06:12:25,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:25,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:25,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:25,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:25,327 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:25,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:25,354 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-20 06:12:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:25,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 06:12:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:25,356 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:12:25,357 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:12:25,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:25,359 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:25,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:12:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 06:12:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:12:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-20 06:12:25,367 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2021-11-20 06:12:25,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:25,368 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-20 06:12:25,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:25,368 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-20 06:12:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:12:25,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:25,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:25,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:25,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:25,592 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2021-11-20 06:12:25,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:25,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722538659] [2021-11-20 06:12:25,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:25,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:25,638 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:25,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231395117] [2021-11-20 06:12:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:25,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:25,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:25,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:12:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:25,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:12:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:26,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:26,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722538659] [2021-11-20 06:12:26,083 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231395117] [2021-11-20 06:12:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231395117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:26,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:12:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198673619] [2021-11-20 06:12:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:12:26,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:26,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:12:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:12:26,089 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:26,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:26,210 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-20 06:12:26,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:12:26,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 06:12:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:26,214 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:12:26,215 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 06:12:26,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:12:26,220 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:26,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 06:12:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-20 06:12:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:12:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-20 06:12:26,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2021-11-20 06:12:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:26,254 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-20 06:12:26,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-20 06:12:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:12:26,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:26,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:26,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:26,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:26,479 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:26,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2021-11-20 06:12:26,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476535492] [2021-11-20 06:12:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:26,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:26,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:26,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023778561] [2021-11-20 06:12:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:26,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:26,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:26,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:12:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:26,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:12:26,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:26,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:26,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476535492] [2021-11-20 06:12:26,789 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:26,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023778561] [2021-11-20 06:12:26,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023778561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:26,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:26,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:12:26,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872510973] [2021-11-20 06:12:26,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:26,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:12:26,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:26,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:12:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:12:26,795 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:26,991 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2021-11-20 06:12:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:12:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-20 06:12:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:26,999 INFO L225 Difference]: With dead ends: 147 [2021-11-20 06:12:27,000 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:12:27,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:12:27,003 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:27,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 201 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:12:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2021-11-20 06:12:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:12:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2021-11-20 06:12:27,040 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2021-11-20 06:12:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:27,041 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2021-11-20 06:12:27,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2021-11-20 06:12:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:12:27,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:27,045 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:27,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:27,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:12:27,261 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2021-11-20 06:12:27,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321085895] [2021-11-20 06:12:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:27,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:27,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:27,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074520568] [2021-11-20 06:12:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:27,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:27,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:27,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:27,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:12:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:12:27,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:27,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:27,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321085895] [2021-11-20 06:12:27,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074520568] [2021-11-20 06:12:27,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074520568] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:27,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:27,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 06:12:27,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718684331] [2021-11-20 06:12:27,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:27,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:12:27,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:27,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:12:27,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:12:27,566 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:12:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:27,788 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2021-11-20 06:12:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:12:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:12:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:27,791 INFO L225 Difference]: With dead ends: 183 [2021-11-20 06:12:27,791 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:12:27,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:12:27,793 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 113 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:27,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 333 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:12:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2021-11-20 06:12:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:12:27,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2021-11-20 06:12:27,827 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2021-11-20 06:12:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:27,833 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2021-11-20 06:12:27,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:12:27,834 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2021-11-20 06:12:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:12:27,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:27,839 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:12:27,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:28,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:28,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2021-11-20 06:12:28,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:28,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111249529] [2021-11-20 06:12:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:28,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:28,075 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:28,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801534324] [2021-11-20 06:12:28,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:28,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:28,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:28,077 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:28,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:12:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:12:28,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:28,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:28,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111249529] [2021-11-20 06:12:28,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:28,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801534324] [2021-11-20 06:12:28,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801534324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:28,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:28,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:12:28,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941687806] [2021-11-20 06:12:28,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:28,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:12:28,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:28,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:12:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:12:28,532 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:12:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:28,796 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2021-11-20 06:12:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:12:28,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-20 06:12:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:28,799 INFO L225 Difference]: With dead ends: 153 [2021-11-20 06:12:28,799 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 06:12:28,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:12:28,801 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:28,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 241 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:12:28,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 06:12:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-11-20 06:12:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:12:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2021-11-20 06:12:28,834 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2021-11-20 06:12:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:28,834 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2021-11-20 06:12:28,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:12:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2021-11-20 06:12:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:12:28,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:28,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:28,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:29,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:29,057 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2021-11-20 06:12:29,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:29,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354094355] [2021-11-20 06:12:29,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:29,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:29,070 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:29,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339700083] [2021-11-20 06:12:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:29,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:29,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:29,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:12:29,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:12:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:12:29,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:29,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354094355] [2021-11-20 06:12:29,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339700083] [2021-11-20 06:12:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339700083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:29,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:29,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2021-11-20 06:12:29,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482016815] [2021-11-20 06:12:29,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:29,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:12:29,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:12:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:12:29,640 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:29,868 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2021-11-20 06:12:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:12:29,869 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-20 06:12:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:29,871 INFO L225 Difference]: With dead ends: 175 [2021-11-20 06:12:29,871 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 06:12:29,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:12:29,872 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:29,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 392 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:12:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 06:12:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2021-11-20 06:12:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:12:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2021-11-20 06:12:29,897 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2021-11-20 06:12:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:29,897 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2021-11-20 06:12:29,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2021-11-20 06:12:29,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:12:29,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:29,899 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:12:29,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:30,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:30,118 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:30,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2021-11-20 06:12:30,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:30,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97687667] [2021-11-20 06:12:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:30,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:30,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:30,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433043474] [2021-11-20 06:12:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:30,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:30,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:30,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:30,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:12:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:30,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:12:30,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:30,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:30,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:30,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97687667] [2021-11-20 06:12:30,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:30,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433043474] [2021-11-20 06:12:30,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433043474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:30,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:30,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:30,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808094477] [2021-11-20 06:12:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:30,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:12:30,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:30,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:12:30,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:30,280 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:30,331 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2021-11-20 06:12:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:12:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-20 06:12:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:30,338 INFO L225 Difference]: With dead ends: 237 [2021-11-20 06:12:30,339 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:12:30,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:30,344 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:30,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:12:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-20 06:12:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:12:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2021-11-20 06:12:30,371 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2021-11-20 06:12:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:30,371 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2021-11-20 06:12:30,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2021-11-20 06:12:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:12:30,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:30,378 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-20 06:12:30,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:30,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:30,593 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:30,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2021-11-20 06:12:30,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459273276] [2021-11-20 06:12:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:30,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:30,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:30,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [255579416] [2021-11-20 06:12:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:30,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:30,606 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:30,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:12:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:12:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:12:30,786 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:30,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:30,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459273276] [2021-11-20 06:12:30,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255579416] [2021-11-20 06:12:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255579416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:30,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:30,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:30,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728993452] [2021-11-20 06:12:30,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:30,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:30,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:30,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:30,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:30,790 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:30,875 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2021-11-20 06:12:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:30,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 06:12:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:30,878 INFO L225 Difference]: With dead ends: 235 [2021-11-20 06:12:30,879 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:12:30,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:30,880 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:30,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:30,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:12:30,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2021-11-20 06:12:30,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 06:12:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2021-11-20 06:12:30,921 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2021-11-20 06:12:30,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:30,921 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2021-11-20 06:12:30,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:30,922 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2021-11-20 06:12:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:12:30,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:30,922 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-20 06:12:30,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:31,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:12:31,149 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:31,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2021-11-20 06:12:31,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:31,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631847209] [2021-11-20 06:12:31,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:31,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:31,155 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:31,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970163387] [2021-11-20 06:12:31,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:31,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:31,160 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:12:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:31,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:12:31,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:31,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:31,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:31,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631847209] [2021-11-20 06:12:31,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:31,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970163387] [2021-11-20 06:12:31,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970163387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:31,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:31,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:12:31,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270708664] [2021-11-20 06:12:31,571 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:12:31,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:12:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:31,573 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:12:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:31,769 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2021-11-20 06:12:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:12:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 06:12:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:31,772 INFO L225 Difference]: With dead ends: 238 [2021-11-20 06:12:31,773 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 06:12:31,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:12:31,774 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 38 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:31,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 271 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:31,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 06:12:31,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-20 06:12:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 06:12:31,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2021-11-20 06:12:31,803 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2021-11-20 06:12:31,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:31,804 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2021-11-20 06:12:31,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:12:31,804 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2021-11-20 06:12:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:12:31,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:31,805 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-11-20 06:12:31,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:32,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:32,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:32,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2021-11-20 06:12:32,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107370449] [2021-11-20 06:12:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:32,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:32,030 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:32,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600243786] [2021-11-20 06:12:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:32,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:32,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:32,032 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:12:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:32,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:12:32,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:12:32,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:32,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:32,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107370449] [2021-11-20 06:12:32,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:32,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600243786] [2021-11-20 06:12:32,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600243786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:32,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:32,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:32,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827474520] [2021-11-20 06:12:32,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:32,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:32,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:32,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:32,208 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:12:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:32,301 INFO L93 Difference]: Finished difference Result 331 states and 488 transitions. [2021-11-20 06:12:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-20 06:12:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:32,305 INFO L225 Difference]: With dead ends: 331 [2021-11-20 06:12:32,306 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 06:12:32,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:32,308 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:32,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 06:12:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 292. [2021-11-20 06:12:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:12:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2021-11-20 06:12:32,362 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2021-11-20 06:12:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:32,362 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2021-11-20 06:12:32,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:12:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2021-11-20 06:12:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:12:32,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:32,364 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:32,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:32,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:12:32,581 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:32,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:32,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2021-11-20 06:12:32,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:32,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847812630] [2021-11-20 06:12:32,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:32,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:32,597 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:32,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981071794] [2021-11-20 06:12:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:32,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:32,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:32,603 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:32,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:12:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:32,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:12:32,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:12:32,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:12:32,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:32,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847812630] [2021-11-20 06:12:32,906 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:32,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981071794] [2021-11-20 06:12:32,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981071794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:32,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:32,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-20 06:12:32,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094542300] [2021-11-20 06:12:32,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:32,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:12:32,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:32,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:12:32,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:12:32,909 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:33,164 INFO L93 Difference]: Finished difference Result 725 states and 1031 transitions. [2021-11-20 06:12:33,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:12:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-20 06:12:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:33,171 INFO L225 Difference]: With dead ends: 725 [2021-11-20 06:12:33,171 INFO L226 Difference]: Without dead ends: 575 [2021-11-20 06:12:33,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:12:33,173 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 136 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:33,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 353 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-20 06:12:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2021-11-20 06:12:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 357 states have (on average 1.2997198879551821) internal successors, (464), 371 states have internal predecessors, (464), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2021-11-20 06:12:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 744 transitions. [2021-11-20 06:12:33,240 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 744 transitions. Word has length 38 [2021-11-20 06:12:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:33,240 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 744 transitions. [2021-11-20 06:12:33,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 744 transitions. [2021-11-20 06:12:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:12:33,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:33,242 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:33,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:33,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:12:33,469 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:33,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2021-11-20 06:12:33,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706017751] [2021-11-20 06:12:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:33,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:33,479 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:33,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236280656] [2021-11-20 06:12:33,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:12:33,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:33,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:33,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:33,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:12:33,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:12:33,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:12:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:33,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:33,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:33,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706017751] [2021-11-20 06:12:33,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:33,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236280656] [2021-11-20 06:12:33,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236280656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:33,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:33,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:33,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127659342] [2021-11-20 06:12:33,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:33,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:33,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:33,653 INFO L87 Difference]: Start difference. First operand 541 states and 744 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:33,807 INFO L93 Difference]: Finished difference Result 788 states and 1135 transitions. [2021-11-20 06:12:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:12:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-11-20 06:12:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:33,813 INFO L225 Difference]: With dead ends: 788 [2021-11-20 06:12:33,813 INFO L226 Difference]: Without dead ends: 643 [2021-11-20 06:12:33,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:12:33,815 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:33,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-20 06:12:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 539. [2021-11-20 06:12:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 359 states have (on average 1.3064066852367688) internal successors, (469), 373 states have internal predecessors, (469), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-20 06:12:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 741 transitions. [2021-11-20 06:12:33,884 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 741 transitions. Word has length 39 [2021-11-20 06:12:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:33,885 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 741 transitions. [2021-11-20 06:12:33,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:12:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 741 transitions. [2021-11-20 06:12:33,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:12:33,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:33,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:33,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:34,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:34,101 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:34,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:34,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2021-11-20 06:12:34,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930078511] [2021-11-20 06:12:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:34,119 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761768385] [2021-11-20 06:12:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:34,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:34,123 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:12:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:34,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:12:34,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:34,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:12:34,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:34,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930078511] [2021-11-20 06:12:34,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:34,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761768385] [2021-11-20 06:12:34,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761768385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:34,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:34,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-20 06:12:34,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942341318] [2021-11-20 06:12:34,505 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:34,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:12:34,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:12:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:12:34,507 INFO L87 Difference]: Start difference. First operand 539 states and 741 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:34,929 INFO L93 Difference]: Finished difference Result 1163 states and 1625 transitions. [2021-11-20 06:12:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:12:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-20 06:12:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:34,936 INFO L225 Difference]: With dead ends: 1163 [2021-11-20 06:12:34,936 INFO L226 Difference]: Without dead ends: 840 [2021-11-20 06:12:34,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:12:34,939 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 205 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:34,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 385 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:12:34,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-20 06:12:35,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 803. [2021-11-20 06:12:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2021-11-20 06:12:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2021-11-20 06:12:35,048 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2021-11-20 06:12:35,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:35,049 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2021-11-20 06:12:35,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:12:35,049 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2021-11-20 06:12:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:12:35,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:35,051 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-11-20 06:12:35,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:35,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:35,265 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:35,265 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2021-11-20 06:12:35,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297012009] [2021-11-20 06:12:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:35,275 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:35,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019993464] [2021-11-20 06:12:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:35,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:35,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:35,277 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:35,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:12:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:12:35,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:12:36,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:12:37,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:37,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297012009] [2021-11-20 06:12:37,764 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:37,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019993464] [2021-11-20 06:12:37,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019993464] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:37,764 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:37,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-20 06:12:37,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12014705] [2021-11-20 06:12:37,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:37,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:12:37,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:37,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:12:37,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:12:37,767 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 06:12:44,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:47,982 INFO L93 Difference]: Finished difference Result 1090 states and 1502 transitions. [2021-11-20 06:12:47,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:12:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2021-11-20 06:12:47,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:47,992 INFO L225 Difference]: With dead ends: 1090 [2021-11-20 06:12:47,992 INFO L226 Difference]: Without dead ends: 1082 [2021-11-20 06:12:47,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:12:47,995 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 150 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:47,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 789 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-20 06:12:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-20 06:12:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 974. [2021-11-20 06:12:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 664 states have (on average 1.2545180722891567) internal successors, (833), 679 states have internal predecessors, (833), 242 states have call successors, (242), 67 states have call predecessors, (242), 67 states have return successors, (238), 227 states have call predecessors, (238), 238 states have call successors, (238) [2021-11-20 06:12:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1313 transitions. [2021-11-20 06:12:48,183 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1313 transitions. Word has length 54 [2021-11-20 06:12:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:48,184 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1313 transitions. [2021-11-20 06:12:48,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 06:12:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1313 transitions. [2021-11-20 06:12:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:12:48,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:48,185 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 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] [2021-11-20 06:12:48,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:48,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:12:48,409 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:48,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2021-11-20 06:12:48,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:48,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573631434] [2021-11-20 06:12:48,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:48,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:48,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465660453] [2021-11-20 06:12:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:48,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:48,437 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:48,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:12:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:48,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:12:48,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:12:48,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:12:48,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573631434] [2021-11-20 06:12:48,980 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:48,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465660453] [2021-11-20 06:12:48,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465660453] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:48,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:48,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-11-20 06:12:48,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532202968] [2021-11-20 06:12:48,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:48,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:12:48,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:12:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:12:48,983 INFO L87 Difference]: Start difference. First operand 974 states and 1313 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:12:49,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:49,893 INFO L93 Difference]: Finished difference Result 2112 states and 2986 transitions. [2021-11-20 06:12:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:12:49,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-11-20 06:12:49,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:49,910 INFO L225 Difference]: With dead ends: 2112 [2021-11-20 06:12:49,910 INFO L226 Difference]: Without dead ends: 2090 [2021-11-20 06:12:49,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:12:49,913 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 342 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:49,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 478 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:12:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-20 06:12:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1979. [2021-11-20 06:12:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1342 states have (on average 1.2876304023845007) internal successors, (1728), 1392 states have internal predecessors, (1728), 529 states have call successors, (529), 107 states have call predecessors, (529), 107 states have return successors, (522), 479 states have call predecessors, (522), 522 states have call successors, (522) [2021-11-20 06:12:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2779 transitions. [2021-11-20 06:12:50,333 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2779 transitions. Word has length 60 [2021-11-20 06:12:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:50,333 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2779 transitions. [2021-11-20 06:12:50,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:12:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2779 transitions. [2021-11-20 06:12:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:12:50,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:50,335 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:50,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:50,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:12:50,557 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2021-11-20 06:12:50,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:50,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112457954] [2021-11-20 06:12:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:50,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:50,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:50,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962979273] [2021-11-20 06:12:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:50,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:50,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:50,573 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:50,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:12:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:50,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:12:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 06:12:50,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 06:12:51,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112457954] [2021-11-20 06:12:51,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962979273] [2021-11-20 06:12:51,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962979273] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:12:51,066 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:12:51,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 06:12:51,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741404028] [2021-11-20 06:12:51,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:51,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:51,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:51,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:12:51,070 INFO L87 Difference]: Start difference. First operand 1979 states and 2779 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:12:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:51,491 INFO L93 Difference]: Finished difference Result 2035 states and 2834 transitions. [2021-11-20 06:12:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:12:51,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 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 63 [2021-11-20 06:12:51,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:51,506 INFO L225 Difference]: With dead ends: 2035 [2021-11-20 06:12:51,506 INFO L226 Difference]: Without dead ends: 2033 [2021-11-20 06:12:51,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:12:51,511 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:51,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:12:51,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-20 06:12:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2015. [2021-11-20 06:12:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 1369 states have (on average 1.2804967129291454) internal successors, (1753), 1419 states have internal predecessors, (1753), 529 states have call successors, (529), 116 states have call predecessors, (529), 116 states have return successors, (522), 479 states have call predecessors, (522), 522 states have call successors, (522) [2021-11-20 06:12:51,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 2804 transitions. [2021-11-20 06:12:51,885 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 2804 transitions. Word has length 63 [2021-11-20 06:12:51,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:51,885 INFO L470 AbstractCegarLoop]: Abstraction has 2015 states and 2804 transitions. [2021-11-20 06:12:51,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:12:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 2804 transitions. [2021-11-20 06:12:51,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:12:51,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:51,887 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-20 06:12:51,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:52,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:52,105 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:52,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2021-11-20 06:12:52,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:52,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034982120] [2021-11-20 06:12:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:52,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:52,114 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:52,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161325800] [2021-11-20 06:12:52,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:52,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:52,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:52,116 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:12:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:12:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:12:52,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:12:52,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034982120] [2021-11-20 06:12:52,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:52,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161325800] [2021-11-20 06:12:52,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161325800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:52,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:52,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-11-20 06:12:52,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677142183] [2021-11-20 06:12:52,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:52,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:12:52,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:52,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:12:52,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:12:52,802 INFO L87 Difference]: Start difference. First operand 2015 states and 2804 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:12:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:53,700 INFO L93 Difference]: Finished difference Result 2415 states and 3356 transitions. [2021-11-20 06:12:53,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:12:53,701 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-11-20 06:12:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:53,716 INFO L225 Difference]: With dead ends: 2415 [2021-11-20 06:12:53,716 INFO L226 Difference]: Without dead ends: 2413 [2021-11-20 06:12:53,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:12:53,719 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 96 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:53,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 541 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:12:53,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-11-20 06:12:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2152. [2021-11-20 06:12:54,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1515 states have (on average 1.2864686468646864) internal successors, (1949), 1574 states have internal predecessors, (1949), 514 states have call successors, (514), 122 states have call predecessors, (514), 122 states have return successors, (507), 455 states have call predecessors, (507), 507 states have call successors, (507) [2021-11-20 06:12:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2970 transitions. [2021-11-20 06:12:54,207 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2970 transitions. Word has length 66 [2021-11-20 06:12:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:54,208 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 2970 transitions. [2021-11-20 06:12:54,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:12:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2970 transitions. [2021-11-20 06:12:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:12:54,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:54,210 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:54,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:54,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:54,425 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:54,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:54,425 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2021-11-20 06:12:54,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:54,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905030353] [2021-11-20 06:12:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:54,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:54,433 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:54,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184739393] [2021-11-20 06:12:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:12:54,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:54,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:54,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:12:54,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:12:54,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:54,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:12:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:12:54,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:12:54,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905030353] [2021-11-20 06:12:54,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:54,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184739393] [2021-11-20 06:12:54,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184739393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:12:54,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:12:54,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:12:54,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956417193] [2021-11-20 06:12:54,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:12:54,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:12:54,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:12:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:12:54,706 INFO L87 Difference]: Start difference. First operand 2152 states and 2970 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:12:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:55,070 INFO L93 Difference]: Finished difference Result 3943 states and 5430 transitions. [2021-11-20 06:12:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:12:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2021-11-20 06:12:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:55,087 INFO L225 Difference]: With dead ends: 3943 [2021-11-20 06:12:55,087 INFO L226 Difference]: Without dead ends: 2296 [2021-11-20 06:12:55,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:12:55,093 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:55,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:12:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-11-20 06:12:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2136. [2021-11-20 06:12:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 1544 states have (on average 1.2830310880829014) internal successors, (1981), 1579 states have internal predecessors, (1981), 471 states have call successors, (471), 120 states have call predecessors, (471), 120 states have return successors, (464), 436 states have call predecessors, (464), 464 states have call successors, (464) [2021-11-20 06:12:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2916 transitions. [2021-11-20 06:12:55,539 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2916 transitions. Word has length 69 [2021-11-20 06:12:55,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:55,540 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 2916 transitions. [2021-11-20 06:12:55,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:12:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2916 transitions. [2021-11-20 06:12:55,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:12:55,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:55,542 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 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] [2021-11-20 06:12:55,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:55,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:55,765 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:55,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:55,765 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2021-11-20 06:12:55,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:55,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132417465] [2021-11-20 06:12:55,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:55,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:55,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:55,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752175281] [2021-11-20 06:12:55,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:12:55,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:55,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:55,777 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:55,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:12:55,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:12:55,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:12:55,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:12:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:56,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 06:12:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:13:01,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:01,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132417465] [2021-11-20 06:13:01,156 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752175281] [2021-11-20 06:13:01,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752175281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:13:01,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:13:01,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-11-20 06:13:01,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316946952] [2021-11-20 06:13:01,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:01,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:13:01,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:13:01,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-11-20 06:13:01,159 INFO L87 Difference]: Start difference. First operand 2136 states and 2916 transitions. Second operand has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:13:07,356 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:08,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:13:08,855 INFO L93 Difference]: Finished difference Result 2303 states and 3148 transitions. [2021-11-20 06:13:08,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:13:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2021-11-20 06:13:08,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:13:08,874 INFO L225 Difference]: With dead ends: 2303 [2021-11-20 06:13:08,874 INFO L226 Difference]: Without dead ends: 2287 [2021-11-20 06:13:08,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=320, Invalid=1401, Unknown=1, NotChecked=0, Total=1722 [2021-11-20 06:13:08,877 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 247 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 302 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:13:08,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 602 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 589 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 06:13:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-11-20 06:13:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2080. [2021-11-20 06:13:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1494 states have (on average 1.2777777777777777) internal successors, (1909), 1522 states have internal predecessors, (1909), 465 states have call successors, (465), 121 states have call predecessors, (465), 120 states have return successors, (464), 436 states have call predecessors, (464), 464 states have call successors, (464) [2021-11-20 06:13:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2838 transitions. [2021-11-20 06:13:09,370 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2838 transitions. Word has length 71 [2021-11-20 06:13:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:13:09,371 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2838 transitions. [2021-11-20 06:13:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:13:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2838 transitions. [2021-11-20 06:13:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:13:09,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:13:09,374 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:13:09,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:13:09,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:09,589 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:13:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:13:09,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2021-11-20 06:13:09,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:13:09,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262900577] [2021-11-20 06:13:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:09,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:13:09,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:13:09,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049101098] [2021-11-20 06:13:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:13:09,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:13:09,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:13:09,602 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:13:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:13:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:13:09,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 06:13:09,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:13:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 39 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:13:11,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:13:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 06:13:12,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:13:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262900577] [2021-11-20 06:13:12,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:13:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049101098] [2021-11-20 06:13:12,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049101098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:13:12,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:13:12,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-11-20 06:13:12,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846139766] [2021-11-20 06:13:12,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:13:12,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:13:12,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:13:12,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:13:12,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:13:12,992 INFO L87 Difference]: Start difference. First operand 2080 states and 2838 transitions. Second operand has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:13:20,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:28,365 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:38,968 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:51,304 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:53,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:13:58,087 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:00,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:00,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:00,874 INFO L93 Difference]: Finished difference Result 2579 states and 3472 transitions. [2021-11-20 06:14:00,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-20 06:14:00,875 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 84 [2021-11-20 06:14:00,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:00,891 INFO L225 Difference]: With dead ends: 2579 [2021-11-20 06:14:00,891 INFO L226 Difference]: Without dead ends: 2573 [2021-11-20 06:14:00,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1239, Invalid=5567, Unknown=0, NotChecked=0, Total=6806 [2021-11-20 06:14:00,896 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 384 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 512 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:00,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 1266 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1663 Invalid, 5 Unknown, 0 Unchecked, 24.8s Time] [2021-11-20 06:14:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2573 states. [2021-11-20 06:14:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2573 to 2283. [2021-11-20 06:14:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 1642 states have (on average 1.2764920828258222) internal successors, (2096), 1673 states have internal predecessors, (2096), 496 states have call successors, (496), 145 states have call predecessors, (496), 144 states have return successors, (495), 464 states have call predecessors, (495), 495 states have call successors, (495) [2021-11-20 06:14:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3087 transitions. [2021-11-20 06:14:01,564 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3087 transitions. Word has length 84 [2021-11-20 06:14:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:01,564 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3087 transitions. [2021-11-20 06:14:01,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:14:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3087 transitions. [2021-11-20 06:14:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:14:01,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:01,567 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:01,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:01,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:14:01,781 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:01,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1264819782, now seen corresponding path program 1 times [2021-11-20 06:14:01,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:01,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868988013] [2021-11-20 06:14:01,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:01,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:01,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:01,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355629018] [2021-11-20 06:14:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:01,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:01,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:01,795 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:01,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:14:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:14:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:14:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:14:02,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:02,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868988013] [2021-11-20 06:14:02,593 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:02,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355629018] [2021-11-20 06:14:02,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355629018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:02,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:02,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-11-20 06:14:02,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051092095] [2021-11-20 06:14:02,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:02,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:14:02,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:14:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:14:02,596 INFO L87 Difference]: Start difference. First operand 2283 states and 3087 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:14:04,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:04,504 INFO L93 Difference]: Finished difference Result 4859 states and 6857 transitions. [2021-11-20 06:14:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:14:04,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 94 [2021-11-20 06:14:04,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:04,530 INFO L225 Difference]: With dead ends: 4859 [2021-11-20 06:14:04,531 INFO L226 Difference]: Without dead ends: 4240 [2021-11-20 06:14:04,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:14:04,536 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 557 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 587 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:14:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-11-20 06:14:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3854. [2021-11-20 06:14:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3854 states, 2625 states have (on average 1.2704761904761905) internal successors, (3335), 2653 states have internal predecessors, (3335), 994 states have call successors, (994), 235 states have call predecessors, (994), 234 states have return successors, (993), 965 states have call predecessors, (993), 993 states have call successors, (993) [2021-11-20 06:14:05,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 5322 transitions. [2021-11-20 06:14:05,714 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 5322 transitions. Word has length 94 [2021-11-20 06:14:05,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:05,715 INFO L470 AbstractCegarLoop]: Abstraction has 3854 states and 5322 transitions. [2021-11-20 06:14:05,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:14:05,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 5322 transitions. [2021-11-20 06:14:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 06:14:05,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:05,718 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:05,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:05,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:05,929 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:05,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1846366132, now seen corresponding path program 1 times [2021-11-20 06:14:05,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:05,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235981951] [2021-11-20 06:14:05,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:05,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:05,944 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:05,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343916008] [2021-11-20 06:14:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:05,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:05,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:05,946 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:05,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:14:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:14:06,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:14:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:14:06,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:14:06,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235981951] [2021-11-20 06:14:06,849 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343916008] [2021-11-20 06:14:06,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343916008] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:06,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:06,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-11-20 06:14:06,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967110818] [2021-11-20 06:14:06,850 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:06,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:14:06,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:06,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:14:06,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:14:06,852 INFO L87 Difference]: Start difference. First operand 3854 states and 5322 transitions. Second operand has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:14:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:08,524 INFO L93 Difference]: Finished difference Result 5776 states and 8017 transitions. [2021-11-20 06:14:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:14:08,525 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 101 [2021-11-20 06:14:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:08,549 INFO L225 Difference]: With dead ends: 5776 [2021-11-20 06:14:08,549 INFO L226 Difference]: Without dead ends: 3697 [2021-11-20 06:14:08,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:14:08,557 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 550 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:08,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 643 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:14:08,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-11-20 06:14:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 3633. [2021-11-20 06:14:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 2440 states have (on average 1.1922131147540984) internal successors, (2909), 2446 states have internal predecessors, (2909), 958 states have call successors, (958), 235 states have call predecessors, (958), 234 states have return successors, (957), 951 states have call predecessors, (957), 957 states have call successors, (957) [2021-11-20 06:14:09,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 4824 transitions. [2021-11-20 06:14:09,528 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 4824 transitions. Word has length 101 [2021-11-20 06:14:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:09,528 INFO L470 AbstractCegarLoop]: Abstraction has 3633 states and 4824 transitions. [2021-11-20 06:14:09,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.333333333333333) internal successors, (104), 24 states have internal predecessors, (104), 7 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-11-20 06:14:09,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 4824 transitions. [2021-11-20 06:14:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:14:09,532 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:09,533 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:09,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:09,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:14:09,761 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1649322963, now seen corresponding path program 2 times [2021-11-20 06:14:09,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215072683] [2021-11-20 06:14:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:09,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:09,768 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:09,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556949543] [2021-11-20 06:14:09,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:09,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:09,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:09,769 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:09,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:14:09,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-20 06:14:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:10,227 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-20 06:14:10,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-11-20 06:14:10,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215072683] [2021-11-20 06:14:10,635 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556949543] [2021-11-20 06:14:10,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556949543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:10,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:10,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 24 [2021-11-20 06:14:10,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050953000] [2021-11-20 06:14:10,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:10,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 06:14:10,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 06:14:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:14:10,638 INFO L87 Difference]: Start difference. First operand 3633 states and 4824 transitions. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-20 06:14:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:12,233 INFO L93 Difference]: Finished difference Result 3706 states and 4892 transitions. [2021-11-20 06:14:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 06:14:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 128 [2021-11-20 06:14:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:12,249 INFO L225 Difference]: With dead ends: 3706 [2021-11-20 06:14:12,250 INFO L226 Difference]: Without dead ends: 3701 [2021-11-20 06:14:12,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=592, Invalid=1048, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:14:12,253 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 486 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:12,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 565 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:14:12,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-11-20 06:14:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3661. [2021-11-20 06:14:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3661 states, 2468 states have (on average 1.1839546191247974) internal successors, (2922), 2474 states have internal predecessors, (2922), 958 states have call successors, (958), 235 states have call predecessors, (958), 234 states have return successors, (957), 951 states have call predecessors, (957), 957 states have call successors, (957) [2021-11-20 06:14:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3661 states to 3661 states and 4837 transitions. [2021-11-20 06:14:13,238 INFO L78 Accepts]: Start accepts. Automaton has 3661 states and 4837 transitions. Word has length 128 [2021-11-20 06:14:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:14:13,239 INFO L470 AbstractCegarLoop]: Abstraction has 3661 states and 4837 transitions. [2021-11-20 06:14:13,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 8 states have call successors, (29), 6 states have call predecessors, (29), 5 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2021-11-20 06:14:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3661 states and 4837 transitions. [2021-11-20 06:14:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-20 06:14:13,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:14:13,245 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:14:13,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:14:13,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:14:13,473 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:14:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:14:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -323662864, now seen corresponding path program 2 times [2021-11-20 06:14:13,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:14:13,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266183276] [2021-11-20 06:14:13,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:14:13,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:14:13,480 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:14:13,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555530610] [2021-11-20 06:14:13,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:14:13,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:14:13,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:14:13,482 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:14:13,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:14:13,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:14:13,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:14:13,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-20 06:14:13,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:14:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 117 proven. 165 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-11-20 06:14:15,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:14:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 179 proven. 12 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [2021-11-20 06:14:17,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:14:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266183276] [2021-11-20 06:14:17,829 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:14:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555530610] [2021-11-20 06:14:17,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555530610] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:14:17,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:14:17,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2021-11-20 06:14:17,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735001704] [2021-11-20 06:14:17,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:14:17,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:14:17,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:14:17,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:14:17,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:14:17,831 INFO L87 Difference]: Start difference. First operand 3661 states and 4837 transitions. Second operand has 30 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 14 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-20 06:14:23,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:26,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:32,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:35,505 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:37,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:46,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:48,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:51,253 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.37s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:54,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:56,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:58,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:14:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:14:59,224 INFO L93 Difference]: Finished difference Result 4552 states and 5956 transitions. [2021-11-20 06:14:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 06:14:59,225 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 14 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) Word has length 138 [2021-11-20 06:14:59,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:14:59,242 INFO L225 Difference]: With dead ends: 4552 [2021-11-20 06:14:59,243 INFO L226 Difference]: Without dead ends: 4546 [2021-11-20 06:14:59,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=652, Invalid=3904, Unknown=0, NotChecked=0, Total=4556 [2021-11-20 06:14:59,247 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 310 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 548 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:14:59,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1143 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1988 Invalid, 9 Unknown, 0 Unchecked, 30.4s Time] [2021-11-20 06:14:59,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2021-11-20 06:15:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 3876. [2021-11-20 06:15:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3876 states, 2588 states have (on average 1.1835394126738794) internal successors, (3063), 2595 states have internal predecessors, (3063), 1025 states have call successors, (1025), 263 states have call predecessors, (1025), 262 states have return successors, (1024), 1017 states have call predecessors, (1024), 1024 states have call successors, (1024) [2021-11-20 06:15:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5112 transitions. [2021-11-20 06:15:00,416 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5112 transitions. Word has length 138 [2021-11-20 06:15:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:00,416 INFO L470 AbstractCegarLoop]: Abstraction has 3876 states and 5112 transitions. [2021-11-20 06:15:00,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 3.36) internal successors, (84), 26 states have internal predecessors, (84), 14 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-20 06:15:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5112 transitions. [2021-11-20 06:15:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-20 06:15:00,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:00,427 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:00,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-20 06:15:00,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:15:00,641 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:00,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2032625502, now seen corresponding path program 3 times [2021-11-20 06:15:00,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:00,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558521132] [2021-11-20 06:15:00,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:00,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:00,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:15:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234830224] [2021-11-20 06:15:00,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:15:00,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:00,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:00,653 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:00,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:15:01,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:15:01,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:15:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:15:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:15:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 105 proven. 46 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-20 06:15:01,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:15:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 105 proven. 46 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2021-11-20 06:15:02,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:15:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558521132] [2021-11-20 06:15:02,276 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:15:02,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234830224] [2021-11-20 06:15:02,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234830224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:15:02,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:15:02,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-20 06:15:02,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018181971] [2021-11-20 06:15:02,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:15:02,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:15:02,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:15:02,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:15:02,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:15:02,278 INFO L87 Difference]: Start difference. First operand 3876 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 06:15:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:15:04,787 INFO L93 Difference]: Finished difference Result 7957 states and 10767 transitions. [2021-11-20 06:15:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:15:04,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) Word has length 168 [2021-11-20 06:15:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:15:04,810 INFO L225 Difference]: With dead ends: 7957 [2021-11-20 06:15:04,811 INFO L226 Difference]: Without dead ends: 5286 [2021-11-20 06:15:04,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 324 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:15:04,821 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 49 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:15:04,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 594 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:15:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5286 states. [2021-11-20 06:15:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5286 to 4850. [2021-11-20 06:15:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4850 states, 3194 states have (on average 1.1959924859110833) internal successors, (3820), 3228 states have internal predecessors, (3820), 1397 states have call successors, (1397), 259 states have call predecessors, (1397), 258 states have return successors, (1396), 1362 states have call predecessors, (1396), 1396 states have call successors, (1396) [2021-11-20 06:15:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4850 states to 4850 states and 6613 transitions. [2021-11-20 06:15:06,717 INFO L78 Accepts]: Start accepts. Automaton has 4850 states and 6613 transitions. Word has length 168 [2021-11-20 06:15:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:15:06,718 INFO L470 AbstractCegarLoop]: Abstraction has 4850 states and 6613 transitions. [2021-11-20 06:15:06,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 7 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2021-11-20 06:15:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 4850 states and 6613 transitions. [2021-11-20 06:15:06,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-20 06:15:06,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:15:06,730 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 11, 10, 7, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:06,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:15:06,957 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:15:06,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:15:06,957 INFO L85 PathProgramCache]: Analyzing trace with hash -287416700, now seen corresponding path program 1 times [2021-11-20 06:15:06,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:15:06,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523377423] [2021-11-20 06:15:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:06,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:15:06,969 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:15:06,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635696708] [2021-11-20 06:15:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:15:06,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:15:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:15:06,971 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:15:06,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:15:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:15:07,352 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:15:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:15:07,753 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:15:07,753 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:15:07,754 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:15:07,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:15:07,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:15:07,979 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:15:07,983 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:15:08,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:15:08 BoogieIcfgContainer [2021-11-20 06:15:08,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:15:08,150 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:15:08,150 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:15:08,150 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:15:08,150 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:12:23" (3/4) ... [2021-11-20 06:15:08,152 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 06:15:08,276 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:15:08,277 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:15:08,278 INFO L158 Benchmark]: Toolchain (without parser) took 165639.44ms. Allocated memory was 88.1MB in the beginning and 849.3MB in the end (delta: 761.3MB). Free memory was 66.7MB in the beginning and 408.7MB in the end (delta: -342.1MB). Peak memory consumption was 419.6MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,278 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:15:08,278 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.66ms. Allocated memory is still 88.1MB. Free memory was 66.4MB in the beginning and 63.8MB in the end (delta: 2.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,279 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.12ms. Allocated memory is still 88.1MB. Free memory was 63.8MB in the beginning and 62.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,279 INFO L158 Benchmark]: Boogie Preprocessor took 46.73ms. Allocated memory is still 88.1MB. Free memory was 62.2MB in the beginning and 60.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,280 INFO L158 Benchmark]: RCFGBuilder took 444.90ms. Allocated memory is still 88.1MB. Free memory was 60.9MB in the beginning and 50.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,280 INFO L158 Benchmark]: TraceAbstraction took 164615.68ms. Allocated memory was 88.1MB in the beginning and 849.3MB in the end (delta: 761.3MB). Free memory was 49.9MB in the beginning and 419.2MB in the end (delta: -369.3MB). Peak memory consumption was 394.1MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,281 INFO L158 Benchmark]: Witness Printer took 127.14ms. Allocated memory is still 849.3MB. Free memory was 419.2MB in the beginning and 408.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:15:08,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 88.1MB. Free memory was 63.8MB in the beginning and 63.7MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.66ms. Allocated memory is still 88.1MB. Free memory was 66.4MB in the beginning and 63.8MB in the end (delta: 2.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.12ms. Allocated memory is still 88.1MB. Free memory was 63.8MB in the beginning and 62.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.73ms. Allocated memory is still 88.1MB. Free memory was 62.2MB in the beginning and 60.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 444.90ms. Allocated memory is still 88.1MB. Free memory was 60.9MB in the beginning and 50.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 164615.68ms. Allocated memory was 88.1MB in the beginning and 849.3MB in the end (delta: 761.3MB). Free memory was 49.9MB in the beginning and 419.2MB in the end (delta: -369.3MB). Peak memory consumption was 394.1MB. Max. memory is 16.1GB. * Witness Printer took 127.14ms. Allocated memory is still 849.3MB. Free memory was 419.2MB in the beginning and 408.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=8, y=13] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=8, y=13] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=8, b=13, counter=0, p=1, q=0, r=0, s=1, x=8, y=13] [L34] EXPR counter++ VAL [a=8, b=13, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=8, b=13, c=8, counter=1, k=0, p=1, q=0, r=0, s=1, x=8, y=13] [L41] EXPR counter++ VAL [a=8, b=13, c=8, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [a=8, b=13, c=8, counter=2, k=0, p=1, q=0, r=0, s=1, x=8, y=13] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=13, b=8, c=8, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=8, y=13] [L34] EXPR counter++ VAL [a=13, b=8, c=8, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=13, b=8, c=13, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=8, y=13] [L41] EXPR counter++ VAL [a=13, b=8, c=13, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=13, b=8, c=13, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L48] EXPR counter++ VAL [a=13, b=8, c=13, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=13, b=8, c=13, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=13, b=8, c=13, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=13, b=8, c=13, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=13, b=8, c=13, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L54] COND TRUE !(c >= 2 * v) VAL [a=13, b=8, c=13, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L59] c = c - v [L60] k = k + d VAL [a=13, b=8, c=5, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L41] EXPR counter++ VAL [a=13, b=8, c=5, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [a=13, b=8, c=5, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=8, x=8, y=13] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=8, b=5, c=5, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=8, y=13] [L34] EXPR counter++ VAL [a=8, b=5, c=5, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=8, b=5, c=8, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=8, y=13] [L41] EXPR counter++ VAL [a=8, b=5, c=8, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=8, b=5, c=8, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L48] EXPR counter++ VAL [a=8, b=5, c=8, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=8, b=5, c=8, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=8, b=5, c=8, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=8, b=5, c=8, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=8, b=5, c=8, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L54] COND TRUE !(c >= 2 * v) VAL [a=8, b=5, c=8, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L59] c = c - v [L60] k = k + d VAL [a=8, b=5, c=3, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L41] EXPR counter++ VAL [a=8, b=5, c=3, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [a=8, b=5, c=3, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=5, x=8, y=13] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=5, b=3, c=3, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=8, y=13] [L34] EXPR counter++ VAL [a=5, b=3, c=3, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=5, b=3, c=5, counter=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=8, y=13] [L41] EXPR counter++ VAL [a=5, b=3, c=5, counter=12, counter++=11, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=5, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=5, b=3, c=5, counter=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L48] EXPR counter++ VAL [a=5, b=3, c=5, counter=13, counter++=12, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=3, c=5, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=3, c=5, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=5, b=3, c=5, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=13] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=13] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=5, b=3, c=5, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L54] COND TRUE !(c >= 2 * v) VAL [a=5, b=3, c=5, counter=13, d=1, k=0, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L59] c = c - v [L60] k = k + d VAL [a=5, b=3, c=2, counter=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L41] EXPR counter++ VAL [a=5, b=3, c=2, counter=14, counter++=13, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [a=5, b=3, c=2, counter=14, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=3, x=8, y=13] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=3, b=2, c=2, counter=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=8, y=13] [L34] EXPR counter++ VAL [a=3, b=2, c=2, counter=15, counter++=14, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=3, b=2, c=3, counter=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=8, y=13] [L41] EXPR counter++ VAL [a=3, b=2, c=3, counter=16, counter++=15, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=3, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=3, b=2, c=3, counter=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L48] EXPR counter++ VAL [a=3, b=2, c=3, counter=17, counter++=16, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L48] COND TRUE counter++<20 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, c=3, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, c=3, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=3, b=2, c=3, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=17] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=17] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=3, b=2, c=3, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L54] COND TRUE !(c >= 2 * v) VAL [a=3, b=2, c=3, counter=17, d=1, k=0, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L59] c = c - v [L60] k = k + d VAL [a=3, b=2, c=1, counter=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L41] EXPR counter++ VAL [a=3, b=2, c=1, counter=18, counter++=17, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND TRUE !(c >= b) VAL [a=3, b=2, c=1, counter=18, d=1, k=1, p=2, q=-3, r=-1, s=2, temp=1, v=2, x=8, y=13] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=2, b=1, c=1, counter=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=8, y=13] [L34] EXPR counter++ VAL [a=2, b=1, c=1, counter=19, counter++=18, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=8, y=13] [L34] COND TRUE counter++<20 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=2, b=1, c=2, counter=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=8, y=13] [L41] EXPR counter++ VAL [a=2, b=1, c=2, counter=20, counter++=19, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=2, x=8, y=13] [L41] COND TRUE counter++<20 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=2, b=1, c=2, counter=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=1, x=8, y=13] [L48] EXPR counter++ VAL [a=2, b=1, c=2, counter=21, counter++=20, d=1, k=0, p=-3, q=5, r=2, s=-3, temp=-1, v=1, x=8, y=13] [L48] COND FALSE !(counter++<20) [L59] c = c - v [L60] k = k + d VAL [a=2, b=1, c=1, counter=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=1, x=8, y=13] [L41] EXPR counter++ VAL [a=2, b=1, c=1, counter=22, counter++=21, d=1, k=1, p=-3, q=5, r=2, s=-3, temp=-1, v=1, x=8, y=13] [L41] COND FALSE !(counter++<20) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=1, b=1, c=1, counter=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=1, x=8, y=13] [L34] EXPR counter++ VAL [a=1, b=1, c=1, counter=23, counter++=22, d=1, k=1, p=5, q=-8, r=-3, s=5, temp=2, v=1, x=8, y=13] [L34] COND FALSE !(counter++<20) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=23] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=23] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=23] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 164.4s, OverallIterations: 29, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 120.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 4216 SdHoareTripleChecker+Valid, 74.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4125 mSDsluCounter, 10850 SdHoareTripleChecker+Invalid, 72.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9171 mSDsCounter, 3018 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8818 IncrementalHoareTripleChecker+Invalid, 11851 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3018 mSolverCounterUnsat, 1679 mSDtfsCounter, 8818 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3013 GetRequests, 2446 SyntacticMatches, 21 SemanticMatches, 546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4839 ImplicationChecksByTransitivity, 42.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4850occurred in iteration=28, InterpolantAutomatonStates: 490, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.9s AutomataMinimizationTime, 28 MinimizatonAttempts, 3085 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 23.8s InterpolantComputationTime, 1752 NumberOfCodeBlocks, 1687 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2723 ConstructedInterpolants, 0 QuantifiedInterpolants, 14959 SizeOfPredicates, 159 NumberOfNonLiveVariables, 4749 ConjunctsInSsa, 622 ConjunctsInUnsatCore, 44 InterpolantComputations, 12 PerfectInterpolantSequences, 4758/6079 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 06:15:08,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7fc1852b-9068-462d-9f70-1e844944c3a8/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE