./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/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 3a97724240a87192496d8328468f54cf5b25ba6881d4dae32505036169c4a273 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:38:18,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:38:18,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:38:19,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:38:19,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:38:19,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:38:19,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:38:19,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:38:19,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:38:19,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:38:19,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:38:19,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:38:19,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:38:19,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:38:19,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:38:19,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:38:19,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:38:19,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:38:19,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:38:19,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:38:19,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:38:19,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:38:19,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:38:19,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:38:19,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:38:19,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:38:19,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:38:19,097 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:38:19,098 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:38:19,099 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:38:19,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:38:19,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:38:19,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:38:19,105 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:38:19,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:38:19,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:38:19,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:38:19,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:38:19,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:38:19,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:38:19,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:38:19,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:38:19,164 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:38:19,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:38:19,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:38:19,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:38:19,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:38:19,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:38:19,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:38:19,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:38:19,174 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:38:19,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:38:19,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:38:19,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:38:19,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:38:19,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:38:19,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:38:19,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:38:19,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:38:19,177 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:38:19,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:38:19,177 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:38:19,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:38:19,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:38:19,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:38:19,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:38:19,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:19,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:38:19,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:38:19,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:38:19,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:38:19,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:38:19,181 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:38:19,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:38:19,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:38:19,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:38:19,182 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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a97724240a87192496d8328468f54cf5b25ba6881d4dae32505036169c4a273 [2021-11-20 06:38:19,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:38:19,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:38:19,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:38:19,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:38:19,459 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:38:19,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i [2021-11-20 06:38:19,527 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/data/afe9f2333/c8b2461bb25645198e249a245419ead0/FLAG0cb2a1bf0 [2021-11-20 06:38:20,119 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:38:20,120 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i [2021-11-20 06:38:20,151 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/data/afe9f2333/c8b2461bb25645198e249a245419ead0/FLAG0cb2a1bf0 [2021-11-20 06:38:20,376 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/data/afe9f2333/c8b2461bb25645198e249a245419ead0 [2021-11-20 06:38:20,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:38:20,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:38:20,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:20,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:38:20,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:38:20,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:20" (1/1) ... [2021-11-20 06:38:20,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@84ed721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:20, skipping insertion in model container [2021-11-20 06:38:20,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:38:20" (1/1) ... [2021-11-20 06:38:20,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:38:20,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:38:21,044 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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i[33021,33034] [2021-11-20 06:38:21,229 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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i[49681,49694] [2021-11-20 06:38:21,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:21,264 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:38:21,309 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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i[33021,33034] [2021-11-20 06:38:21,410 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_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test5-1.i[49681,49694] [2021-11-20 06:38:21,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:38:21,468 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:38:21,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21 WrapperNode [2021-11-20 06:38:21,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:38:21,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:21,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:38:21,470 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:38:21,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,554 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,673 INFO L137 Inliner]: procedures = 177, calls = 388, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1402 [2021-11-20 06:38:21,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:38:21,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:38:21,675 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:38:21,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:38:21,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:38:21,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:38:21,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:38:21,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:38:21,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (1/1) ... [2021-11-20 06:38:21,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:38:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:21,889 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:38:21,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:38:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:38:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:38:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:38:21,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:38:21,938 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:38:21,938 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 06:38:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:38:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:38:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:38:21,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:38:21,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:38:22,263 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:38:22,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:38:23,864 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:38:23,886 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:38:23,887 INFO L301 CfgBuilder]: Removed 83 assume(true) statements. [2021-11-20 06:38:23,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:23 BoogieIcfgContainer [2021-11-20 06:38:23,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:38:23,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:38:23,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:38:23,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:38:23,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:38:20" (1/3) ... [2021-11-20 06:38:23,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78226ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:23, skipping insertion in model container [2021-11-20 06:38:23,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:38:21" (2/3) ... [2021-11-20 06:38:23,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78226ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:38:23, skipping insertion in model container [2021-11-20 06:38:23,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:38:23" (3/3) ... [2021-11-20 06:38:23,901 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test5-1.i [2021-11-20 06:38:23,907 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:38:23,907 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:38:23,970 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:38:23,987 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:38:23,987 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:38:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:38:24,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:24,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:24,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:24,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:24,032 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-11-20 06:38:24,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:24,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936629941] [2021-11-20 06:38:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:24,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:24,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073120320] [2021-11-20 06:38:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:24,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:24,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:24,159 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:24,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:38:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:24,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-20 06:38:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:24,378 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 06:38:24,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:24,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936629941] [2021-11-20 06:38:24,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073120320] [2021-11-20 06:38:24,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073120320] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:24,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:24,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:38:24,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060148746] [2021-11-20 06:38:24,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:24,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:38:24,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:24,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:38:24,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:24,429 INFO L87 Difference]: Start difference. First operand has 258 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 249 states have internal predecessors, (411), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 06:38:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:24,518 INFO L93 Difference]: Finished difference Result 514 states and 869 transitions. [2021-11-20 06:38:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:38:24,521 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2021-11-20 06:38:24,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:24,544 INFO L225 Difference]: With dead ends: 514 [2021-11-20 06:38:24,545 INFO L226 Difference]: Without dead ends: 254 [2021-11-20 06:38:24,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:38:24,562 INFO L933 BasicCegarLoop]: 341 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, 341 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:24,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:24,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-20 06:38:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-11-20 06:38:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-11-20 06:38:24,624 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-11-20 06:38:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:24,624 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-11-20 06:38:24,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 06:38:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-11-20 06:38:24,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:38:24,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:24,627 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] [2021-11-20 06:38:24,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:24,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-20 06:38:24,832 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-11-20 06:38:24,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:24,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345431171] [2021-11-20 06:38:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:24,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:24,854 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:24,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549618736] [2021-11-20 06:38:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:24,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:24,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:24,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:24,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:38:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:38:25,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:25,186 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 06:38:25,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:25,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345431171] [2021-11-20 06:38:25,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:25,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549618736] [2021-11-20 06:38:25,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549618736] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:25,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:25,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:25,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970535050] [2021-11-20 06:38:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:25,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:25,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:25,199 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:25,275 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2021-11-20 06:38:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-20 06:38:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:25,280 INFO L225 Difference]: With dead ends: 573 [2021-11-20 06:38:25,280 INFO L226 Difference]: Without dead ends: 495 [2021-11-20 06:38:25,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 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 06:38:25,286 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 300 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:25,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 730 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:38:25,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-11-20 06:38:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2021-11-20 06:38:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2021-11-20 06:38:25,325 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2021-11-20 06:38:25,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:25,326 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2021-11-20 06:38:25,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:25,326 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2021-11-20 06:38:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:25,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:25,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:25,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:25,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:25,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2021-11-20 06:38:25,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:25,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302034993] [2021-11-20 06:38:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:25,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:25,590 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:25,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031258078] [2021-11-20 06:38:25,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:25,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:25,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:25,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:25,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:38:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:25,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:25,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:26,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:26,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302034993] [2021-11-20 06:38:26,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031258078] [2021-11-20 06:38:26,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031258078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:26,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:26,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:26,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663384176] [2021-11-20 06:38:26,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:26,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:26,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:26,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:26,159 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:26,233 INFO L93 Difference]: Finished difference Result 528 states and 704 transitions. [2021-11-20 06:38:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:26,236 INFO L225 Difference]: With dead ends: 528 [2021-11-20 06:38:26,237 INFO L226 Difference]: Without dead ends: 276 [2021-11-20 06:38:26,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 06:38:26,241 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 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 06:38:26,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:26,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-20 06:38:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-11-20 06:38:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 266 states have internal predecessors, (336), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 358 transitions. [2021-11-20 06:38:26,278 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 358 transitions. Word has length 140 [2021-11-20 06:38:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:26,281 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 358 transitions. [2021-11-20 06:38:26,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 358 transitions. [2021-11-20 06:38:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:26,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:26,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:26,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:26,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:26,498 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:26,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1918424274, now seen corresponding path program 1 times [2021-11-20 06:38:26,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:26,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989553084] [2021-11-20 06:38:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:26,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:26,519 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13417653] [2021-11-20 06:38:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:26,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:26,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:26,536 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:26,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:38:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:26,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:27,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:27,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:27,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989553084] [2021-11-20 06:38:27,043 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:27,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13417653] [2021-11-20 06:38:27,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13417653] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:27,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:27,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:27,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563696356] [2021-11-20 06:38:27,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:27,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:27,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:27,053 INFO L87 Difference]: Start difference. First operand 275 states and 358 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:27,121 INFO L93 Difference]: Finished difference Result 568 states and 744 transitions. [2021-11-20 06:38:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:27,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:27,124 INFO L225 Difference]: With dead ends: 568 [2021-11-20 06:38:27,125 INFO L226 Difference]: Without dead ends: 296 [2021-11-20 06:38:27,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 06:38:27,126 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 8 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 621 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 06:38:27,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 621 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-20 06:38:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-11-20 06:38:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 280 states have (on average 1.2714285714285714) internal successors, (356), 286 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:27,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2021-11-20 06:38:27,139 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 140 [2021-11-20 06:38:27,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:27,140 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2021-11-20 06:38:27,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:27,140 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2021-11-20 06:38:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:27,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:27,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:27,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:27,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:27,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:27,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:27,356 INFO L85 PathProgramCache]: Analyzing trace with hash -690363184, now seen corresponding path program 1 times [2021-11-20 06:38:27,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115536830] [2021-11-20 06:38:27,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:27,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:27,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:27,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649306979] [2021-11-20 06:38:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:27,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:27,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:27,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:38:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:27,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:27,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:27,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:27,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:27,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115536830] [2021-11-20 06:38:27,823 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:27,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649306979] [2021-11-20 06:38:27,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649306979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:27,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:27,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:27,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735768082] [2021-11-20 06:38:27,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:27,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:27,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:27,826 INFO L87 Difference]: Start difference. First operand 295 states and 378 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:27,905 INFO L93 Difference]: Finished difference Result 393 states and 514 transitions. [2021-11-20 06:38:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:27,909 INFO L225 Difference]: With dead ends: 393 [2021-11-20 06:38:27,909 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 06:38:27,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 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 06:38:27,910 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 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 06:38:27,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 06:38:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-11-20 06:38:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 300 states have (on average 1.2533333333333334) internal successors, (376), 306 states have internal predecessors, (376), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:27,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2021-11-20 06:38:27,922 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 140 [2021-11-20 06:38:27,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:27,923 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2021-11-20 06:38:27,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 06:38:27,923 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2021-11-20 06:38:27,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:27,925 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:27,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:27,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:28,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:28,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -909217902, now seen corresponding path program 1 times [2021-11-20 06:38:28,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:28,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30538815] [2021-11-20 06:38:28,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:28,169 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:28,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021908113] [2021-11-20 06:38:28,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:28,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:28,172 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:28,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:38:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:28,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:28,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30538815] [2021-11-20 06:38:28,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021908113] [2021-11-20 06:38:28,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021908113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:28,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:28,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:38:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97044506] [2021-11-20 06:38:28,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:28,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:38:28,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:38:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:28,586 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 06:38:28,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:28,668 INFO L93 Difference]: Finished difference Result 619 states and 785 transitions. [2021-11-20 06:38:28,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:28,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:28,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:28,671 INFO L225 Difference]: With dead ends: 619 [2021-11-20 06:38:28,671 INFO L226 Difference]: Without dead ends: 307 [2021-11-20 06:38:28,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 06:38:28,674 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 294 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 647 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 06:38:28,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 647 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-20 06:38:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2021-11-20 06:38:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 286 states have (on average 1.2412587412587412) internal successors, (355), 292 states have internal predecessors, (355), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 377 transitions. [2021-11-20 06:38:28,689 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 377 transitions. Word has length 140 [2021-11-20 06:38:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:28,690 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 377 transitions. [2021-11-20 06:38:28,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 06:38:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 377 transitions. [2021-11-20 06:38:28,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:28,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:28,692 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:28,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:28,902 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash -992002364, now seen corresponding path program 1 times [2021-11-20 06:38:28,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:28,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242521241] [2021-11-20 06:38:28,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:28,919 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:28,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63903835] [2021-11-20 06:38:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:28,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:28,921 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:28,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:38:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:29,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:38:29,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:29,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:29,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242521241] [2021-11-20 06:38:29,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63903835] [2021-11-20 06:38:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63903835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:29,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:29,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:38:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767354424] [2021-11-20 06:38:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:29,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:38:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:38:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:38:29,411 INFO L87 Difference]: Start difference. First operand 301 states and 377 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 06:38:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:29,527 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2021-11-20 06:38:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:29,531 INFO L225 Difference]: With dead ends: 680 [2021-11-20 06:38:29,531 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 06:38:29,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 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 06:38:29,533 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 276 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:29,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1243 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 06:38:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 287. [2021-11-20 06:38:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 278 states have internal predecessors, (334), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2021-11-20 06:38:29,548 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 140 [2021-11-20 06:38:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:29,548 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2021-11-20 06:38:29,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 06:38:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2021-11-20 06:38:29,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:29,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:29,551 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:29,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:29,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:38:29,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1368143440, now seen corresponding path program 1 times [2021-11-20 06:38:29,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:29,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700543216] [2021-11-20 06:38:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:29,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:29,790 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:29,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676336275] [2021-11-20 06:38:29,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:29,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:29,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:29,792 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:29,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:38:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:38:30,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:30,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:30,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700543216] [2021-11-20 06:38:30,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:30,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676336275] [2021-11-20 06:38:30,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676336275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:30,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:30,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:38:30,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337735451] [2021-11-20 06:38:30,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:30,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:38:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:38:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:38:30,188 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 06:38:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:30,258 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-11-20 06:38:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:38:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 140 [2021-11-20 06:38:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:30,261 INFO L225 Difference]: With dead ends: 375 [2021-11-20 06:38:30,261 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 06:38:30,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 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 06:38:30,263 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 80 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 819 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 06:38:30,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 819 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 06:38:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2021-11-20 06:38:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 258 states have (on average 1.2131782945736433) internal successors, (313), 264 states have internal predecessors, (313), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 06:38:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 335 transitions. [2021-11-20 06:38:30,275 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 335 transitions. Word has length 140 [2021-11-20 06:38:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:30,275 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 335 transitions. [2021-11-20 06:38:30,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 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 06:38:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 335 transitions. [2021-11-20 06:38:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-20 06:38:30,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:30,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:30,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:30,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:38:30,500 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:30,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash 485294594, now seen corresponding path program 1 times [2021-11-20 06:38:30,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:30,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585626016] [2021-11-20 06:38:30,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:30,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:30,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673319699] [2021-11-20 06:38:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:30,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:30,516 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:30,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:38:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:30,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:38:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:31,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:31,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585626016] [2021-11-20 06:38:31,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673319699] [2021-11-20 06:38:31,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673319699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:31,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:31,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-20 06:38:31,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558106247] [2021-11-20 06:38:31,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:31,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:38:31,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:38:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:38:31,284 INFO L87 Difference]: Start difference. First operand 273 states and 335 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 06:38:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:31,448 INFO L93 Difference]: Finished difference Result 1057 states and 1307 transitions. [2021-11-20 06:38:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:38:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 140 [2021-11-20 06:38:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:31,455 INFO L225 Difference]: With dead ends: 1057 [2021-11-20 06:38:31,455 INFO L226 Difference]: Without dead ends: 973 [2021-11-20 06:38:31,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:38:31,457 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 1652 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:31,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1691 Valid, 1262 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-11-20 06:38:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 819. [2021-11-20 06:38:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 786 states have (on average 1.1997455470737914) internal successors, (943), 792 states have internal predecessors, (943), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 06:38:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1001 transitions. [2021-11-20 06:38:31,493 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1001 transitions. Word has length 140 [2021-11-20 06:38:31,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:31,493 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1001 transitions. [2021-11-20 06:38:31,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 06:38:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1001 transitions. [2021-11-20 06:38:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-11-20 06:38:31,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:31,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:31,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:31,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:31,719 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:31,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash -541614505, now seen corresponding path program 2 times [2021-11-20 06:38:31,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735192733] [2021-11-20 06:38:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:31,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:31,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:31,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072999822] [2021-11-20 06:38:31,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:38:31,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:31,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:31,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:31,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:38:32,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:38:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:32,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:38:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:32,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:34,081 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:38:34,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:34,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735192733] [2021-11-20 06:38:34,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:34,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072999822] [2021-11-20 06:38:34,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072999822] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:34,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:34,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-20 06:38:34,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088009360] [2021-11-20 06:38:34,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:34,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:38:34,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:34,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:38:34,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:34,087 INFO L87 Difference]: Start difference. First operand 819 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 06:38:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:34,643 INFO L93 Difference]: Finished difference Result 2380 states and 2939 transitions. [2021-11-20 06:38:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:38:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 434 [2021-11-20 06:38:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:34,658 INFO L225 Difference]: With dead ends: 2380 [2021-11-20 06:38:34,658 INFO L226 Difference]: Without dead ends: 2296 [2021-11-20 06:38:34,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:38:34,660 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 4663 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4753 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:34,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4753 Valid, 3214 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:38:34,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-11-20 06:38:34,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1911. [2021-11-20 06:38:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1842 states have (on average 1.1959826275787189) internal successors, (2203), 1848 states have internal predecessors, (2203), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2021-11-20 06:38:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2333 transitions. [2021-11-20 06:38:34,732 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2333 transitions. Word has length 434 [2021-11-20 06:38:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:34,733 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2333 transitions. [2021-11-20 06:38:34,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 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 06:38:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2333 transitions. [2021-11-20 06:38:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2021-11-20 06:38:34,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:34,780 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:34,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:35,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:38:35,008 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1302990785, now seen corresponding path program 3 times [2021-11-20 06:38:35,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:35,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848797825] [2021-11-20 06:38:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:35,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:35,056 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:35,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625375502] [2021-11-20 06:38:35,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:38:35,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:35,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:35,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:38:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:38:35,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:38:35,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:38:35,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 4275 trivial. 0 not checked. [2021-11-20 06:38:39,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:39,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848797825] [2021-11-20 06:38:39,842 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625375502] [2021-11-20 06:38:39,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625375502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:39,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:39,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:39,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443772436] [2021-11-20 06:38:39,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:39,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:39,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:39,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:39,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:39,846 INFO L87 Difference]: Start difference. First operand 1911 states and 2333 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:39,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:39,975 INFO L93 Difference]: Finished difference Result 3736 states and 4568 transitions. [2021-11-20 06:38:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:39,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1022 [2021-11-20 06:38:39,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:39,987 INFO L225 Difference]: With dead ends: 3736 [2021-11-20 06:38:39,987 INFO L226 Difference]: Without dead ends: 1970 [2021-11-20 06:38:39,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1020 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 06:38:39,991 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 660 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 06:38:39,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 660 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-11-20 06:38:40,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1968. [2021-11-20 06:38:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1894 states have (on average 1.195881731784583) internal successors, (2265), 1905 states have internal predecessors, (2265), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-11-20 06:38:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2405 transitions. [2021-11-20 06:38:40,069 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2405 transitions. Word has length 1022 [2021-11-20 06:38:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:40,070 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2405 transitions. [2021-11-20 06:38:40,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:38:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2405 transitions. [2021-11-20 06:38:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-11-20 06:38:40,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:40,095 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2021-11-20 06:38:40,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:40,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:40,324 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:40,324 INFO L85 PathProgramCache]: Analyzing trace with hash -194714094, now seen corresponding path program 1 times [2021-11-20 06:38:40,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:40,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552742765] [2021-11-20 06:38:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:40,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:40,383 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:40,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80684572] [2021-11-20 06:38:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:40,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:40,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:40,385 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:40,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:38:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:41,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 2580 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:38:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2021-11-20 06:38:42,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:42,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552742765] [2021-11-20 06:38:42,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80684572] [2021-11-20 06:38:42,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80684572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:42,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:42,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:42,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158360403] [2021-11-20 06:38:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:42,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:42,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:42,762 INFO L87 Difference]: Start difference. First operand 1968 states and 2405 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 06:38:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:42,865 INFO L93 Difference]: Finished difference Result 3878 states and 4744 transitions. [2021-11-20 06:38:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 1037 [2021-11-20 06:38:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:42,878 INFO L225 Difference]: With dead ends: 3878 [2021-11-20 06:38:42,878 INFO L226 Difference]: Without dead ends: 1966 [2021-11-20 06:38:42,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1035 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 06:38:42,883 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 15 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:42,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 616 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-11-20 06:38:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1966. [2021-11-20 06:38:42,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1892 states have (on average 1.1955602536997887) internal successors, (2262), 1903 states have internal predecessors, (2262), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-11-20 06:38:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2402 transitions. [2021-11-20 06:38:42,954 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2402 transitions. Word has length 1037 [2021-11-20 06:38:42,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:42,954 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 2402 transitions. [2021-11-20 06:38:42,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 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 06:38:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2402 transitions. [2021-11-20 06:38:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2021-11-20 06:38:43,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:43,005 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:43,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:43,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:43,224 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:43,224 INFO L85 PathProgramCache]: Analyzing trace with hash 556149393, now seen corresponding path program 1 times [2021-11-20 06:38:43,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:43,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838630173] [2021-11-20 06:38:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:43,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:43,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:43,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547431628] [2021-11-20 06:38:43,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:43,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:43,285 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:43,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:38:44,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:38:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 2685 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:38:44,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:38:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2021-11-20 06:38:48,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:38:48,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:38:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838630173] [2021-11-20 06:38:48,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:38:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547431628] [2021-11-20 06:38:48,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547431628] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:38:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:38:48,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:38:48,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970241649] [2021-11-20 06:38:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:38:48,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:38:48,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:38:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:38:48,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:38:48,234 INFO L87 Difference]: Start difference. First operand 1966 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:38:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:38:48,370 INFO L93 Difference]: Finished difference Result 4886 states and 5976 transitions. [2021-11-20 06:38:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:38:48,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1052 [2021-11-20 06:38:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:38:48,392 INFO L225 Difference]: With dead ends: 4886 [2021-11-20 06:38:48,392 INFO L226 Difference]: Without dead ends: 3418 [2021-11-20 06:38:48,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1050 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 06:38:48,397 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 141 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:38:48,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 797 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:38:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-11-20 06:38:48,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3416. [2021-11-20 06:38:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3309 states have (on average 1.1967361740707163) internal successors, (3960), 3320 states have internal predecessors, (3960), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-20 06:38:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4166 transitions. [2021-11-20 06:38:48,528 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4166 transitions. Word has length 1052 [2021-11-20 06:38:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:38:48,530 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4166 transitions. [2021-11-20 06:38:48,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:38:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4166 transitions. [2021-11-20 06:38:48,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2021-11-20 06:38:48,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:38:48,551 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:38:48,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:38:48,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:38:48,768 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:38:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:38:48,769 INFO L85 PathProgramCache]: Analyzing trace with hash -458320069, now seen corresponding path program 1 times [2021-11-20 06:38:48,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:38:48,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172491941] [2021-11-20 06:38:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:48,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:38:48,828 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:38:48,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572110007] [2021-11-20 06:38:48,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:38:48,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:38:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:38:48,833 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:38:48,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5bd3f85d-e7c1-4ea1-9e77-9a4df16cbebf/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process