./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i --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_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/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_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/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_5d711fe6-026c-4743-a2cb-2b310ab11372/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 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:55:31,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:55:31,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:55:31,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:55:31,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:55:31,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:55:31,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:55:31,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:55:31,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:55:31,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:55:31,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:55:31,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:55:31,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:55:31,444 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:55:31,446 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:55:31,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:55:31,450 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:55:31,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:55:31,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:55:31,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:55:31,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:55:31,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:55:31,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:55:31,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:55:31,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:55:31,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:55:31,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:55:31,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:55:31,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:55:31,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:55:31,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:55:31,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:55:31,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:55:31,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:55:31,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:55:31,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:55:31,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:55:31,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:55:31,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:55:31,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:55:31,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:55:31,490 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 05:55:31,526 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:55:31,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:55:31,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:55:31,527 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:55:31,528 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:55:31,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:55:31,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:55:31,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:55:31,529 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:55:31,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:55:31,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:55:31,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:55:31,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:55:31,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:55:31,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 05:55:31,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:55:31,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 05:55:31,532 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:55:31,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 05:55:31,533 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:55:31,533 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 05:55:31,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:55:31,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:55:31,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:55:31,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:55:31,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:55:31,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:55:31,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 05:55:31,544 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:55:31,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:55:31,547 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 05:55:31,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 05:55:31,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 05:55:31,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:55:31,548 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_5d711fe6-026c-4743-a2cb-2b310ab11372/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 [2021-11-20 05:55:31,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:55:31,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:55:31,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:55:31,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:55:31,970 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:55:31,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-11-20 05:55:32,062 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/data/99bab7af1/3dc1d413d54749ec88cd943113fde358/FLAGa0a44fb43 [2021-11-20 05:55:32,957 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:55:32,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2021-11-20 05:55:32,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/data/99bab7af1/3dc1d413d54749ec88cd943113fde358/FLAGa0a44fb43 [2021-11-20 05:55:33,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/data/99bab7af1/3dc1d413d54749ec88cd943113fde358 [2021-11-20 05:55:33,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:55:33,029 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:55:33,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:55:33,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:55:33,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:55:33,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:55:33" (1/1) ... [2021-11-20 05:55:33,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6472b29b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:33, skipping insertion in model container [2021-11-20 05:55:33,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:55:33" (1/1) ... [2021-11-20 05:55:33,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:55:33,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:55:33,907 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_5d711fe6-026c-4743-a2cb-2b310ab11372/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2021-11-20 05:55:34,205 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_5d711fe6-026c-4743-a2cb-2b310ab11372/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2021-11-20 05:55:34,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:55:34,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:55:34,269 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_5d711fe6-026c-4743-a2cb-2b310ab11372/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2021-11-20 05:55:34,484 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_5d711fe6-026c-4743-a2cb-2b310ab11372/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2021-11-20 05:55:34,486 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:55:34,545 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:55:34,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34 WrapperNode [2021-11-20 05:55:34,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:55:34,547 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:55:34,548 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:55:34,548 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:55:34,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,813 INFO L137 Inliner]: procedures = 177, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2864 [2021-11-20 05:55:34,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:55:34,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:55:34,815 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:55:34,815 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:55:34,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:34,963 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:35,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:35,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:35,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:55:35,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:55:35,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:55:35,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:55:35,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (1/1) ... [2021-11-20 05:55:35,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:55:35,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:35,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:55:35,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:55:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 05:55:35,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 05:55:35,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 05:55:35,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 05:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 05:55:35,188 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 05:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:55:35,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 05:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 05:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:55:35,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 05:55:35,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:55:35,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:55:35,488 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:55:35,490 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:55:38,208 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:55:38,238 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:55:38,238 INFO L301 CfgBuilder]: Removed 54 assume(true) statements. [2021-11-20 05:55:38,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:55:38 BoogieIcfgContainer [2021-11-20 05:55:38,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:55:38,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:55:38,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:55:38,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:55:38,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:55:33" (1/3) ... [2021-11-20 05:55:38,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d2e2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:55:38, skipping insertion in model container [2021-11-20 05:55:38,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:55:34" (2/3) ... [2021-11-20 05:55:38,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d2e2b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:55:38, skipping insertion in model container [2021-11-20 05:55:38,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:55:38" (3/3) ... [2021-11-20 05:55:38,255 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-1.i [2021-11-20 05:55:38,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:55:38,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 05:55:38,335 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:55:38,344 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 05:55:38,344 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 05:55:38,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 05:55:38,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:38,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:38,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:38,435 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-11-20 05:55:38,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:38,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923403371] [2021-11-20 05:55:38,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:38,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:38,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:38,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923403371] [2021-11-20 05:55:38,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923403371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:38,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:38,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 05:55:38,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707415501] [2021-11-20 05:55:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:38,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 05:55:38,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 05:55:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 05:55:38,757 INFO L87 Difference]: Start difference. First operand has 1167 states, 659 states have (on average 1.922610015174507) internal successors, (1267), 1161 states have internal predecessors, (1267), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:38,996 INFO L93 Difference]: Finished difference Result 2332 states and 5044 transitions. [2021-11-20 05:55:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 05:55:38,999 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 05:55:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:39,053 INFO L225 Difference]: With dead ends: 2332 [2021-11-20 05:55:39,053 INFO L226 Difference]: Without dead ends: 1163 [2021-11-20 05:55:39,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 05:55:39,080 INFO L933 BasicCegarLoop]: 2213 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, 2213 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 05:55:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-11-20 05:55:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-11-20 05:55:39,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:39,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-11-20 05:55:39,864 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-11-20 05:55:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:39,865 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-11-20 05:55:39,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:39,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-11-20 05:55:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 05:55:39,868 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:39,869 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:39,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 05:55:39,869 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:39,871 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-11-20 05:55:39,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306968016] [2021-11-20 05:55:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:39,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:39,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306968016] [2021-11-20 05:55:39,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306968016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:39,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:39,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:39,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999762491] [2021-11-20 05:55:39,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:39,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:39,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:39,982 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:41,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:41,664 INFO L93 Difference]: Finished difference Result 3333 states and 6429 transitions. [2021-11-20 05:55:41,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:41,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-20 05:55:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:41,692 INFO L225 Difference]: With dead ends: 3333 [2021-11-20 05:55:41,693 INFO L226 Difference]: Without dead ends: 2264 [2021-11-20 05:55:41,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:41,712 INFO L933 BasicCegarLoop]: 2673 mSDtfsCounter, 1128 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:41,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 6988 Invalid, 640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-20 05:55:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-11-20 05:55:42,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1165. [2021-11-20 05:55:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.831306990881459) internal successors, (1205), 1159 states have internal predecessors, (1205), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2211 transitions. [2021-11-20 05:55:42,344 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2211 transitions. Word has length 44 [2021-11-20 05:55:42,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:42,344 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2211 transitions. [2021-11-20 05:55:42,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2211 transitions. [2021-11-20 05:55:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:55:42,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:42,366 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:42,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 05:55:42,366 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:42,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:42,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1509497837, now seen corresponding path program 1 times [2021-11-20 05:55:42,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:42,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60154789] [2021-11-20 05:55:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:42,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:42,394 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472859889] [2021-11-20 05:55:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:42,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:42,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:42,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 05:55:42,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:55:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:42,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:42,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:42,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60154789] [2021-11-20 05:55:42,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:42,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472859889] [2021-11-20 05:55:42,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472859889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:42,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:42,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:55:42,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184267441] [2021-11-20 05:55:42,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:42,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:55:42,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:42,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:55:42,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:42,934 INFO L87 Difference]: Start difference. First operand 1165 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:43,104 INFO L93 Difference]: Finished difference Result 2347 states and 4449 transitions. [2021-11-20 05:55:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:55:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:55:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:43,125 INFO L225 Difference]: With dead ends: 2347 [2021-11-20 05:55:43,125 INFO L226 Difference]: Without dead ends: 1186 [2021-11-20 05:55:43,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:43,134 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 9 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4363 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:43,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:43,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-11-20 05:55:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1185. [2021-11-20 05:55:43,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 678 states have (on average 1.8067846607669618) internal successors, (1225), 1179 states have internal predecessors, (1225), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2231 transitions. [2021-11-20 05:55:43,414 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2231 transitions. Word has length 96 [2021-11-20 05:55:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:43,415 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 2231 transitions. [2021-11-20 05:55:43,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:43,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2231 transitions. [2021-11-20 05:55:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:55:43,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:43,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:43,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:43,634 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:43,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1482432235, now seen corresponding path program 1 times [2021-11-20 05:55:43,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:43,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517669023] [2021-11-20 05:55:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:43,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:43,680 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401264806] [2021-11-20 05:55:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:43,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:43,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:43,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 05:55:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:55:43,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:44,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:44,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517669023] [2021-11-20 05:55:44,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:44,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401264806] [2021-11-20 05:55:44,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401264806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:44,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:44,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:55:44,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869224503] [2021-11-20 05:55:44,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:44,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:55:44,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:44,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:55:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:44,117 INFO L87 Difference]: Start difference. First operand 1185 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:44,289 INFO L93 Difference]: Finished difference Result 2274 states and 4348 transitions. [2021-11-20 05:55:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:55:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:55:44,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:44,307 INFO L225 Difference]: With dead ends: 2274 [2021-11-20 05:55:44,307 INFO L226 Difference]: Without dead ends: 1206 [2021-11-20 05:55:44,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:44,319 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 8 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:44,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4365 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-11-20 05:55:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1205. [2021-11-20 05:55:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 698 states have (on average 1.7836676217765044) internal successors, (1245), 1199 states have internal predecessors, (1245), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2251 transitions. [2021-11-20 05:55:44,575 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2251 transitions. Word has length 96 [2021-11-20 05:55:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:44,576 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2251 transitions. [2021-11-20 05:55:44,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2251 transitions. [2021-11-20 05:55:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:55:44,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:44,579 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:44,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:44,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:44,802 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1801417811, now seen corresponding path program 1 times [2021-11-20 05:55:44,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:44,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514902257] [2021-11-20 05:55:44,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:44,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:44,823 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:44,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1188287109] [2021-11-20 05:55:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:44,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:44,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:44,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:44,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 05:55:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:55:45,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:45,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:45,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514902257] [2021-11-20 05:55:45,225 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188287109] [2021-11-20 05:55:45,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188287109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:45,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:45,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:45,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053143680] [2021-11-20 05:55:45,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:45,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:45,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:45,228 INFO L87 Difference]: Start difference. First operand 1205 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:45,443 INFO L93 Difference]: Finished difference Result 2398 states and 4490 transitions. [2021-11-20 05:55:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:45,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:55:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:45,457 INFO L225 Difference]: With dead ends: 2398 [2021-11-20 05:55:45,458 INFO L226 Difference]: Without dead ends: 1197 [2021-11-20 05:55:45,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:45,466 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 1182 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4886 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:45,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4886 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:45,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-11-20 05:55:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1191. [2021-11-20 05:55:45,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 684 states have (on average 1.7894736842105263) internal successors, (1224), 1185 states have internal predecessors, (1224), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2230 transitions. [2021-11-20 05:55:45,725 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2230 transitions. Word has length 96 [2021-11-20 05:55:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:45,726 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 2230 transitions. [2021-11-20 05:55:45,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2230 transitions. [2021-11-20 05:55:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:55:45,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:45,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:45,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:45,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:45,942 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:45,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:45,942 INFO L85 PathProgramCache]: Analyzing trace with hash 432450363, now seen corresponding path program 1 times [2021-11-20 05:55:45,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:45,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589926922] [2021-11-20 05:55:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:45,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:45,962 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:45,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870644586] [2021-11-20 05:55:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:45,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:45,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:45,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 05:55:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:46,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:55:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:46,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:46,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589926922] [2021-11-20 05:55:46,361 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:46,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870644586] [2021-11-20 05:55:46,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870644586] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:46,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:46,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 05:55:46,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091087429] [2021-11-20 05:55:46,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:46,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:55:46,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:46,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:55:46,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:46,365 INFO L87 Difference]: Start difference. First operand 1191 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:46,584 INFO L93 Difference]: Finished difference Result 2271 states and 4328 transitions. [2021-11-20 05:55:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:55:46,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:46,598 INFO L225 Difference]: With dead ends: 2271 [2021-11-20 05:55:46,598 INFO L226 Difference]: Without dead ends: 1183 [2021-11-20 05:55:46,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:46,607 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 1076 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:46,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 4973 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:46,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-20 05:55:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1177. [2021-11-20 05:55:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 670 states have (on average 1.7955223880597015) internal successors, (1203), 1171 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2209 transitions. [2021-11-20 05:55:46,832 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2209 transitions. Word has length 96 [2021-11-20 05:55:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:46,833 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2209 transitions. [2021-11-20 05:55:46,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2209 transitions. [2021-11-20 05:55:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-20 05:55:46,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:46,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:46,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:47,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 05:55:47,050 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:47,051 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-11-20 05:55:47,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:47,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290851427] [2021-11-20 05:55:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:47,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:47,074 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:47,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625494072] [2021-11-20 05:55:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:47,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:47,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:47,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:47,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 05:55:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:47,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:55:47,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:55:47,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:47,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290851427] [2021-11-20 05:55:47,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625494072] [2021-11-20 05:55:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625494072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:47,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 05:55:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47395789] [2021-11-20 05:55:47,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:47,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 05:55:47,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 05:55:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:47,695 INFO L87 Difference]: Start difference. First operand 1177 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:47,951 INFO L93 Difference]: Finished difference Result 3446 states and 6522 transitions. [2021-11-20 05:55:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 05:55:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-20 05:55:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:47,979 INFO L225 Difference]: With dead ends: 3446 [2021-11-20 05:55:47,979 INFO L226 Difference]: Without dead ends: 2273 [2021-11-20 05:55:47,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 05:55:47,990 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1065 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:47,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 4911 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-20 05:55:48,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2021-11-20 05:55:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1264 states have (on average 1.8259493670886076) internal successors, (2308), 2265 states have internal predecessors, (2308), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-11-20 05:55:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4314 transitions. [2021-11-20 05:55:48,457 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4314 transitions. Word has length 96 [2021-11-20 05:55:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:48,458 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 4314 transitions. [2021-11-20 05:55:48,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 05:55:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4314 transitions. [2021-11-20 05:55:48,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 05:55:48,460 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:48,460 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:48,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:48,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 05:55:48,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash 372571869, now seen corresponding path program 1 times [2021-11-20 05:55:48,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:48,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850166775] [2021-11-20 05:55:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:48,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:48,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:48,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096490753] [2021-11-20 05:55:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:48,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:48,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:48,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 05:55:48,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:55:48,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:49,240 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 05:55:49,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:49,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:49,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850166775] [2021-11-20 05:55:49,242 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:49,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096490753] [2021-11-20 05:55:49,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096490753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:49,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:49,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:49,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135278638] [2021-11-20 05:55:49,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:49,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:49,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:49,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:49,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:49,246 INFO L87 Difference]: Start difference. First operand 2271 states and 4314 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:55:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:50,974 INFO L93 Difference]: Finished difference Result 3444 states and 6519 transitions. [2021-11-20 05:55:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-20 05:55:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:50,989 INFO L225 Difference]: With dead ends: 3444 [2021-11-20 05:55:50,989 INFO L226 Difference]: Without dead ends: 1221 [2021-11-20 05:55:51,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:51,003 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2254 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:51,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-20 05:55:51,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-11-20 05:55:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-11-20 05:55:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1215 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-11-20 05:55:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2256 transitions. [2021-11-20 05:55:51,233 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2256 transitions. Word has length 111 [2021-11-20 05:55:51,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:51,234 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2256 transitions. [2021-11-20 05:55:51,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:55:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2256 transitions. [2021-11-20 05:55:51,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 05:55:51,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:51,237 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:51,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:51,462 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2029466899, now seen corresponding path program 1 times [2021-11-20 05:55:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128634590] [2021-11-20 05:55:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:51,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:51,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411492485] [2021-11-20 05:55:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:51,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:51,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:51,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:51,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 05:55:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:51,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:55:51,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:52,154 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 05:55:52,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 05:55:52,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128634590] [2021-11-20 05:55:52,155 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:52,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411492485] [2021-11-20 05:55:52,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411492485] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 05:55:52,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:55:52,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 05:55:52,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020348063] [2021-11-20 05:55:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 05:55:52,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:55:52,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:55:52,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:55:52,158 INFO L87 Difference]: Start difference. First operand 1221 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:55:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:52,334 INFO L93 Difference]: Finished difference Result 2394 states and 4461 transitions. [2021-11-20 05:55:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:55:52,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-11-20 05:55:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:52,347 INFO L225 Difference]: With dead ends: 2394 [2021-11-20 05:55:52,348 INFO L226 Difference]: Without dead ends: 1224 [2021-11-20 05:55:52,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:55:52,355 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 2 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6569 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:52,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6569 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:55:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-20 05:55:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2021-11-20 05:55:52,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 716 states have (on average 1.75) internal successors, (1253), 1218 states have internal predecessors, (1253), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-20 05:55:52,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2260 transitions. [2021-11-20 05:55:52,594 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2260 transitions. Word has length 118 [2021-11-20 05:55:52,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:52,595 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2260 transitions. [2021-11-20 05:55:52,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:55:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2260 transitions. [2021-11-20 05:55:52,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 05:55:52,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:52,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:55:52,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:52,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:52,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:52,815 INFO L85 PathProgramCache]: Analyzing trace with hash -629194827, now seen corresponding path program 1 times [2021-11-20 05:55:52,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:52,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335988955] [2021-11-20 05:55:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:52,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:52,834 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:52,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194872810] [2021-11-20 05:55:52,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:52,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:52,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:52,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 05:55:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:55:54,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 05:55:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:54,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 05:55:54,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335988955] [2021-11-20 05:55:54,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:54,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194872810] [2021-11-20 05:55:54,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194872810] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:54,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:54,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 05:55:54,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46039208] [2021-11-20 05:55:54,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:54,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:55:54,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:55:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:55:54,962 INFO L87 Difference]: Start difference. First operand 1224 states and 2260 transitions. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:55:55,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:55,303 INFO L93 Difference]: Finished difference Result 2408 states and 4483 transitions. [2021-11-20 05:55:55,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 05:55:55,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 120 [2021-11-20 05:55:55,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:55,315 INFO L225 Difference]: With dead ends: 2408 [2021-11-20 05:55:55,315 INFO L226 Difference]: Without dead ends: 1233 [2021-11-20 05:55:55,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:55:55,323 INFO L933 BasicCegarLoop]: 2190 mSDtfsCounter, 25 mSDsluCounter, 6560 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8750 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:55,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 8750 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:55:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-11-20 05:55:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2021-11-20 05:55:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.7472375690607735) internal successors, (1265), 1226 states have internal predecessors, (1265), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (505), 4 states have call predecessors, (505), 503 states have call successors, (505) [2021-11-20 05:55:55,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2273 transitions. [2021-11-20 05:55:55,672 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2273 transitions. Word has length 120 [2021-11-20 05:55:55,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:55,673 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2273 transitions. [2021-11-20 05:55:55,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 05:55:55,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2273 transitions. [2021-11-20 05:55:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 05:55:55,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:55,676 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:55,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:55,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 05:55:55,902 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:55,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:55,903 INFO L85 PathProgramCache]: Analyzing trace with hash -938959405, now seen corresponding path program 2 times [2021-11-20 05:55:55,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:55,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42562892] [2021-11-20 05:55:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:55,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:55,938 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147644709] [2021-11-20 05:55:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 05:55:55,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:55,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:55,940 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:55,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 05:55:56,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 05:55:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 05:55:56,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 05:55:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:55:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 05:55:56,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:55:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 05:55:57,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 05:55:57,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42562892] [2021-11-20 05:55:57,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 05:55:57,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147644709] [2021-11-20 05:55:57,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147644709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 05:55:57,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 05:55:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-11-20 05:55:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281220169] [2021-11-20 05:55:57,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 05:55:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 05:55:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 05:55:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 05:55:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 05:55:57,351 INFO L87 Difference]: Start difference. First operand 1233 states and 2273 transitions. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:55:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:55:57,871 INFO L93 Difference]: Finished difference Result 2419 states and 4496 transitions. [2021-11-20 05:55:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 05:55:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-11-20 05:55:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:55:57,885 INFO L225 Difference]: With dead ends: 2419 [2021-11-20 05:55:57,885 INFO L226 Difference]: Without dead ends: 1239 [2021-11-20 05:55:57,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-20 05:55:57,893 INFO L933 BasicCegarLoop]: 2190 mSDtfsCounter, 27 mSDsluCounter, 8734 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10924 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:55:57,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 10924 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:55:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-11-20 05:55:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1237. [2021-11-20 05:55:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 728 states have (on average 1.745879120879121) internal successors, (1271), 1230 states have internal predecessors, (1271), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-11-20 05:55:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2278 transitions. [2021-11-20 05:55:58,187 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2278 transitions. Word has length 124 [2021-11-20 05:55:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:55:58,188 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 2278 transitions. [2021-11-20 05:55:58,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 05:55:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2278 transitions. [2021-11-20 05:55:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 05:55:58,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:55:58,191 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:55:58,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:55:58,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:58,412 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 05:55:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:55:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash -743144621, now seen corresponding path program 3 times [2021-11-20 05:55:58,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 05:55:58,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942824318] [2021-11-20 05:55:58,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:55:58,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 05:55:58,443 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 05:55:58,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667361525] [2021-11-20 05:55:58,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 05:55:58,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 05:55:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:55:58,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 05:55:58,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d711fe6-026c-4743-a2cb-2b310ab11372/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process