./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/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 89806bf5e92e08240ee093afcceea93b900865db28253b34ac5f2402fc0c0eb8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:49:57,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:49:57,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:49:57,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:49:57,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:49:57,093 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:49:57,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:49:57,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:49:57,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:49:57,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:49:57,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:49:57,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:49:57,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:49:57,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:49:57,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:49:57,117 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:49:57,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:49:57,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:49:57,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:49:57,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:49:57,134 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:49:57,135 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:49:57,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:49:57,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:49:57,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:49:57,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:49:57,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:49:57,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:49:57,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:49:57,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:49:57,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:49:57,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:49:57,155 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:49:57,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:49:57,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:49:57,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:49:57,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:49:57,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:49:57,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:49:57,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:49:57,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:49:57,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:49:57,200 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:49:57,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:49:57,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:49:57,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:49:57,208 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:49:57,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:49:57,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:49:57,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:49:57,209 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:49:57,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:49:57,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:49:57,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:49:57,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:49:57,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:49:57,212 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:49:57,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:49:57,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:49:57,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:49:57,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:49:57,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:49:57,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:49:57,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:49:57,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:49:57,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:49:57,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:49:57,215 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:49:57,215 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:49:57,216 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:49:57,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:49:57,216 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89806bf5e92e08240ee093afcceea93b900865db28253b34ac5f2402fc0c0eb8 [2021-11-20 06:49:57,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:49:57,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:49:57,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:49:57,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:49:57,522 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:49:57,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i [2021-11-20 06:49:57,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/data/9cc7a24e1/bcd6f81efe624e9ab17de71f63fc8dc8/FLAG23ac23264 [2021-11-20 06:49:58,205 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:49:58,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i [2021-11-20 06:49:58,239 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/data/9cc7a24e1/bcd6f81efe624e9ab17de71f63fc8dc8/FLAG23ac23264 [2021-11-20 06:49:58,423 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/data/9cc7a24e1/bcd6f81efe624e9ab17de71f63fc8dc8 [2021-11-20 06:49:58,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:49:58,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:49:58,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:58,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:49:58,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:49:58,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:58" (1/1) ... [2021-11-20 06:49:58,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db67c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:58, skipping insertion in model container [2021-11-20 06:49:58,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:49:58" (1/1) ... [2021-11-20 06:49:58,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:49:58,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:49:58,995 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[33021,33034] [2021-11-20 06:49:59,156 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44124,44137] [2021-11-20 06:49:59,159 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44245,44258] [2021-11-20 06:49:59,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:59,175 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:49:59,201 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[33021,33034] [2021-11-20 06:49:59,249 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44124,44137] [2021-11-20 06:49:59,260 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_c209fce8-22d1-4c83-9b04-a7abf513d2f7/sv-benchmarks/c/uthash-2.0.2/uthash_FNV_test7-1.i[44245,44258] [2021-11-20 06:49:59,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:49:59,312 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:49:59,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59 WrapperNode [2021-11-20 06:49:59,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:49:59,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:59,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:49:59,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:49:59,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,423 INFO L137 Inliner]: procedures = 176, calls = 277, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 996 [2021-11-20 06:49:59,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:49:59,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:49:59,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:49:59,425 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:49:59,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,538 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:49:59,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:49:59,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:49:59,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:49:59,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (1/1) ... [2021-11-20 06:49:59,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:49:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:49:59,598 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:49:59,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:49:59,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 06:49:59,639 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 06:49:59,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:49:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:49:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:49:59,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:49:59,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:49:59,815 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:49:59,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:50:00,746 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:50:00,755 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:50:00,755 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-20 06:50:00,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:50:00 BoogieIcfgContainer [2021-11-20 06:50:00,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:50:00,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:50:00,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:50:00,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:50:00,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:49:58" (1/3) ... [2021-11-20 06:50:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90d4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:50:00, skipping insertion in model container [2021-11-20 06:50:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:49:59" (2/3) ... [2021-11-20 06:50:00,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c90d4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:50:00, skipping insertion in model container [2021-11-20 06:50:00,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:50:00" (3/3) ... [2021-11-20 06:50:00,766 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_FNV_test7-1.i [2021-11-20 06:50:00,771 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:50:00,771 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:50:00,820 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:50:00,826 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 06:50:00,827 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:50:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:50:00,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:00,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:00,853 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:00,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:00,858 INFO L85 PathProgramCache]: Analyzing trace with hash -2094566776, now seen corresponding path program 1 times [2021-11-20 06:50:00,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:00,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749826438] [2021-11-20 06:50:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:00,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:01,010 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 06:50:01,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:01,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749826438] [2021-11-20 06:50:01,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749826438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:01,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:01,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:50:01,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521921490] [2021-11-20 06:50:01,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:01,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:50:01,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:50:01,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:50:01,046 INFO L87 Difference]: Start difference. First operand has 186 states, 179 states have (on average 1.6983240223463687) internal successors, (304), 181 states have internal predecessors, (304), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 06:50:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:01,088 INFO L93 Difference]: Finished difference Result 369 states and 617 transitions. [2021-11-20 06:50:01,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:50:01,090 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 06:50:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:01,099 INFO L225 Difference]: With dead ends: 369 [2021-11-20 06:50:01,099 INFO L226 Difference]: Without dead ends: 181 [2021-11-20 06:50:01,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:50:01,106 INFO L933 BasicCegarLoop]: 240 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, 240 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 06:50:01,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-20 06:50:01,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-20 06:50:01,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 175 states have (on average 1.3142857142857143) internal successors, (230), 176 states have internal predecessors, (230), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 236 transitions. [2021-11-20 06:50:01,179 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 236 transitions. Word has length 8 [2021-11-20 06:50:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:01,180 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 236 transitions. [2021-11-20 06:50:01,180 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 06:50:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 236 transitions. [2021-11-20 06:50:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:50:01,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:01,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:01,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:50:01,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:01,182 INFO L85 PathProgramCache]: Analyzing trace with hash -716312389, now seen corresponding path program 1 times [2021-11-20 06:50:01,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996355017] [2021-11-20 06:50:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:01,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:01,246 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 06:50:01,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996355017] [2021-11-20 06:50:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996355017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:01,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:01,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:01,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652379238] [2021-11-20 06:50:01,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:01,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:01,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:01,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:01,250 INFO L87 Difference]: Start difference. First operand 181 states and 236 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:50:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:01,618 INFO L93 Difference]: Finished difference Result 386 states and 505 transitions. [2021-11-20 06:50:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-20 06:50:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:01,621 INFO L225 Difference]: With dead ends: 386 [2021-11-20 06:50:01,621 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 06:50:01,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:01,624 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 146 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:01,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 578 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:50:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 06:50:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 183. [2021-11-20 06:50:01,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 177 states have (on average 1.310734463276836) internal successors, (232), 178 states have internal predecessors, (232), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 238 transitions. [2021-11-20 06:50:01,647 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 238 transitions. Word has length 10 [2021-11-20 06:50:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:01,647 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 238 transitions. [2021-11-20 06:50:01,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 06:50:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 238 transitions. [2021-11-20 06:50:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:50:01,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:01,651 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:01,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:50:01,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1437380185, now seen corresponding path program 1 times [2021-11-20 06:50:01,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:01,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759920584] [2021-11-20 06:50:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:01,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:01,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991720967] [2021-11-20 06:50:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:01,678 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:50:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:01,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:01,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:01,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759920584] [2021-11-20 06:50:01,986 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991720967] [2021-11-20 06:50:01,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991720967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:01,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:01,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:50:01,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895610879] [2021-11-20 06:50:01,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:01,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:50:01,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:50:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:50:01,989 INFO L87 Difference]: Start difference. First operand 183 states and 238 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 06:50:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:02,057 INFO L93 Difference]: Finished difference Result 383 states and 503 transitions. [2021-11-20 06:50:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:50:02,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-20 06:50:02,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:02,060 INFO L225 Difference]: With dead ends: 383 [2021-11-20 06:50:02,060 INFO L226 Difference]: Without dead ends: 204 [2021-11-20 06:50:02,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 06:50:02,063 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 9 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 417 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 06:50:02,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 417 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-20 06:50:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-20 06:50:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 197 states have (on average 1.2791878172588833) internal successors, (252), 198 states have internal predecessors, (252), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:02,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 258 transitions. [2021-11-20 06:50:02,076 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 258 transitions. Word has length 62 [2021-11-20 06:50:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:02,077 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 258 transitions. [2021-11-20 06:50:02,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 06:50:02,077 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 258 transitions. [2021-11-20 06:50:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:50:02,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:02,080 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:02,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:02,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:02,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -539986907, now seen corresponding path program 1 times [2021-11-20 06:50:02,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:02,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017684381] [2021-11-20 06:50:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:02,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:02,318 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:02,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741918446] [2021-11-20 06:50:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:02,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:02,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:02,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:02,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:50:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:02,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:02,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:02,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017684381] [2021-11-20 06:50:02,612 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:02,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741918446] [2021-11-20 06:50:02,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741918446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:02,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:02,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:02,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848461090] [2021-11-20 06:50:02,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:02,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:02,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:02,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:02,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:02,622 INFO L87 Difference]: Start difference. First operand 203 states and 258 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 06:50:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:02,721 INFO L93 Difference]: Finished difference Result 394 states and 504 transitions. [2021-11-20 06:50:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 62 [2021-11-20 06:50:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:02,723 INFO L225 Difference]: With dead ends: 394 [2021-11-20 06:50:02,723 INFO L226 Difference]: Without dead ends: 195 [2021-11-20 06:50:02,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 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 06:50:02,728 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 214 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 435 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 06:50:02,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 435 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-20 06:50:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 189. [2021-11-20 06:50:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.2622950819672132) internal successors, (231), 184 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:02,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 237 transitions. [2021-11-20 06:50:02,752 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 237 transitions. Word has length 62 [2021-11-20 06:50:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:02,753 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 237 transitions. [2021-11-20 06:50:02,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 06:50:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 237 transitions. [2021-11-20 06:50:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:50:02,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:02,761 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:02,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:02,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:02,987 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -67840205, now seen corresponding path program 1 times [2021-11-20 06:50:02,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646259850] [2021-11-20 06:50:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:03,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:03,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790691600] [2021-11-20 06:50:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:03,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:03,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:03,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:03,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:50:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:50:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:03,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:03,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:03,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646259850] [2021-11-20 06:50:03,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:03,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790691600] [2021-11-20 06:50:03,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790691600] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:03,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:03,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:50:03,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158743613] [2021-11-20 06:50:03,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:03,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:50:03,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:50:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:50:03,488 INFO L87 Difference]: Start difference. First operand 189 states and 237 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 06:50:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:03,593 INFO L93 Difference]: Finished difference Result 487 states and 610 transitions. [2021-11-20 06:50:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:50:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-20 06:50:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:03,596 INFO L225 Difference]: With dead ends: 487 [2021-11-20 06:50:03,596 INFO L226 Difference]: Without dead ends: 302 [2021-11-20 06:50:03,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 60 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 06:50:03,598 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 101 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:03,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 473 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:03,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-20 06:50:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 295. [2021-11-20 06:50:03,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 289 states have (on average 1.259515570934256) internal successors, (364), 290 states have internal predecessors, (364), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 370 transitions. [2021-11-20 06:50:03,609 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 370 transitions. Word has length 62 [2021-11-20 06:50:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:03,609 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 370 transitions. [2021-11-20 06:50:03,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 06:50:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 370 transitions. [2021-11-20 06:50:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 06:50:03,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:03,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:03,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:03,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:03,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:03,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -681144927, now seen corresponding path program 1 times [2021-11-20 06:50:03,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:03,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761089090] [2021-11-20 06:50:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:03,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:03,852 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:03,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204790397] [2021-11-20 06:50:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:03,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:03,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:03,854 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:03,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:50:04,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 06:50:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 06:50:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:04,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:04,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761089090] [2021-11-20 06:50:04,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204790397] [2021-11-20 06:50:04,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204790397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:04,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:04,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751321276] [2021-11-20 06:50:04,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:04,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:04,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:04,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:04,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:04,237 INFO L87 Difference]: Start difference. First operand 295 states and 370 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 06:50:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:04,582 INFO L93 Difference]: Finished difference Result 383 states and 487 transitions. [2021-11-20 06:50:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 77 [2021-11-20 06:50:04,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:04,585 INFO L225 Difference]: With dead ends: 383 [2021-11-20 06:50:04,585 INFO L226 Difference]: Without dead ends: 379 [2021-11-20 06:50:04,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 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 06:50:04,586 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 135 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:04,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 578 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:50:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-20 06:50:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 297. [2021-11-20 06:50:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 292 states have internal predecessors, (366), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2021-11-20 06:50:04,599 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 77 [2021-11-20 06:50:04,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:04,600 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2021-11-20 06:50:04,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 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 06:50:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2021-11-20 06:50:04,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:04,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:04,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:04,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:04,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:50:04,823 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash -433623545, now seen corresponding path program 1 times [2021-11-20 06:50:04,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:04,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043412257] [2021-11-20 06:50:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:04,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:04,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:04,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613781677] [2021-11-20 06:50:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:04,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:04,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:04,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:50:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:04,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:50:04,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:05,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:05,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:05,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043412257] [2021-11-20 06:50:05,167 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:05,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613781677] [2021-11-20 06:50:05,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613781677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:05,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:05,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:50:05,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024234506] [2021-11-20 06:50:05,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:05,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:50:05,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:50:05,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:50:05,172 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 06:50:05,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:05,232 INFO L93 Difference]: Finished difference Result 487 states and 631 transitions. [2021-11-20 06:50:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:50:05,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-20 06:50:05,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:05,238 INFO L225 Difference]: With dead ends: 487 [2021-11-20 06:50:05,238 INFO L226 Difference]: Without dead ends: 339 [2021-11-20 06:50:05,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 06:50:05,240 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 8 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:05,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 405 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-20 06:50:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-11-20 06:50:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 331 states have (on average 1.2265861027190332) internal successors, (406), 332 states have internal predecessors, (406), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 412 transitions. [2021-11-20 06:50:05,253 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 412 transitions. Word has length 111 [2021-11-20 06:50:05,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:05,254 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 412 transitions. [2021-11-20 06:50:05,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 06:50:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 412 transitions. [2021-11-20 06:50:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:05,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:05,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:05,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:05,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:50:05,487 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:05,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:05,487 INFO L85 PathProgramCache]: Analyzing trace with hash 577493705, now seen corresponding path program 1 times [2021-11-20 06:50:05,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:05,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954641877] [2021-11-20 06:50:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:05,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:05,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:05,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302516842] [2021-11-20 06:50:05,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:05,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:05,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:05,510 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:05,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:50:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:05,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:50:05,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:50:05,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:05,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954641877] [2021-11-20 06:50:05,861 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:05,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302516842] [2021-11-20 06:50:05,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302516842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:05,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:05,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:50:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866026105] [2021-11-20 06:50:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:50:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:50:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:05,864 INFO L87 Difference]: Start difference. First operand 337 states and 412 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 06:50:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:05,962 INFO L93 Difference]: Finished difference Result 502 states and 626 transitions. [2021-11-20 06:50:05,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:05,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-20 06:50:05,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:05,966 INFO L225 Difference]: With dead ends: 502 [2021-11-20 06:50:05,966 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:50:05,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 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 06:50:05,967 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 102 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:05,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 597 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:50:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 309. [2021-11-20 06:50:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.2013201320132014) internal successors, (364), 304 states have internal predecessors, (364), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 370 transitions. [2021-11-20 06:50:05,980 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 370 transitions. Word has length 111 [2021-11-20 06:50:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:05,981 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 370 transitions. [2021-11-20 06:50:05,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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 06:50:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 370 transitions. [2021-11-20 06:50:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-20 06:50:05,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:05,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:06,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:06,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:06,199 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:06,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:06,199 INFO L85 PathProgramCache]: Analyzing trace with hash -580114755, now seen corresponding path program 1 times [2021-11-20 06:50:06,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:06,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460898208] [2021-11-20 06:50:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:06,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:06,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:06,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473497997] [2021-11-20 06:50:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:06,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:06,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:06,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:06,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:50:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:50:06,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:50:06,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460898208] [2021-11-20 06:50:06,617 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:06,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473497997] [2021-11-20 06:50:06,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473497997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:06,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:06,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:06,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462837440] [2021-11-20 06:50:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:06,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:06,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:06,619 INFO L87 Difference]: Start difference. First operand 309 states and 370 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:50:06,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:06,957 INFO L93 Difference]: Finished difference Result 661 states and 798 transitions. [2021-11-20 06:50:06,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:06,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-11-20 06:50:06,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:06,960 INFO L225 Difference]: With dead ends: 661 [2021-11-20 06:50:06,960 INFO L226 Difference]: Without dead ends: 400 [2021-11-20 06:50:06,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:06,961 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 410 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:06,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 381 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:50:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-20 06:50:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 393. [2021-11-20 06:50:06,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 387 states have (on average 1.2093023255813953) internal successors, (468), 388 states have internal predecessors, (468), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:50:06,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 474 transitions. [2021-11-20 06:50:06,977 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 474 transitions. Word has length 111 [2021-11-20 06:50:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:06,978 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 474 transitions. [2021-11-20 06:50:06,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:50:06,978 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 474 transitions. [2021-11-20 06:50:06,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-20 06:50:06,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:06,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:07,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:07,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:07,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -405991821, now seen corresponding path program 1 times [2021-11-20 06:50:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466173808] [2021-11-20 06:50:07,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:07,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:07,209 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:07,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373796028] [2021-11-20 06:50:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:07,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:07,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:07,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:50:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:07,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:50:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:50:07,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:50:07,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:07,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466173808] [2021-11-20 06:50:07,677 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:07,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373796028] [2021-11-20 06:50:07,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373796028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:50:07,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:50:07,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:50:07,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189371887] [2021-11-20 06:50:07,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:50:07,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:50:07,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:50:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:50:07,680 INFO L87 Difference]: Start difference. First operand 393 states and 474 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:50:07,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:07,717 INFO L93 Difference]: Finished difference Result 738 states and 897 transitions. [2021-11-20 06:50:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:50:07,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2021-11-20 06:50:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:07,721 INFO L225 Difference]: With dead ends: 738 [2021-11-20 06:50:07,722 INFO L226 Difference]: Without dead ends: 396 [2021-11-20 06:50:07,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:50:07,723 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 2 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:07,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 653 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:50:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-20 06:50:07,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2021-11-20 06:50:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 389 states have (on average 1.2107969151670952) internal successors, (471), 391 states have internal predecessors, (471), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:50:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 478 transitions. [2021-11-20 06:50:07,754 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 478 transitions. Word has length 118 [2021-11-20 06:50:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:07,755 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 478 transitions. [2021-11-20 06:50:07,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:50:07,755 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 478 transitions. [2021-11-20 06:50:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-20 06:50:07,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:07,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:07,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:07,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:50:07,971 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:07,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:07,971 INFO L85 PathProgramCache]: Analyzing trace with hash 2065893013, now seen corresponding path program 1 times [2021-11-20 06:50:07,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:07,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847764716] [2021-11-20 06:50:07,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:07,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:07,983 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:07,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795220730] [2021-11-20 06:50:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:07,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:07,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:07,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:07,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:50:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:50:08,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:50:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:50:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:50:09,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:09,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847764716] [2021-11-20 06:50:09,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:09,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795220730] [2021-11-20 06:50:09,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795220730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:09,090 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:50:09,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:50:09,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651186975] [2021-11-20 06:50:09,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:09,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:50:09,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:50:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:50:09,092 INFO L87 Difference]: Start difference. First operand 396 states and 478 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:50:09,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:09,280 INFO L93 Difference]: Finished difference Result 752 states and 918 transitions. [2021-11-20 06:50:09,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:50:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-11-20 06:50:09,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:09,286 INFO L225 Difference]: With dead ends: 752 [2021-11-20 06:50:09,286 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 06:50:09,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:50:09,290 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 18 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:09,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 658 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:50:09,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 06:50:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 405. [2021-11-20 06:50:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 397 states have (on average 1.221662468513854) internal successors, (485), 399 states have internal predecessors, (485), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:50:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 492 transitions. [2021-11-20 06:50:09,316 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 492 transitions. Word has length 120 [2021-11-20 06:50:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 492 transitions. [2021-11-20 06:50:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:50:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 492 transitions. [2021-11-20 06:50:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-20 06:50:09,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:09,318 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:09,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:09,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:09,531 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:09,531 INFO L85 PathProgramCache]: Analyzing trace with hash 726992563, now seen corresponding path program 2 times [2021-11-20 06:50:09,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34816903] [2021-11-20 06:50:09,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:09,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:09,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:09,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [420666443] [2021-11-20 06:50:09,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:50:09,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:09,545 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:50:09,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:50:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:50:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:50:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:50:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:50:10,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:50:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:50:10,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:50:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34816903] [2021-11-20 06:50:10,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:50:10,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420666443] [2021-11-20 06:50:10,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420666443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:50:10,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:50:10,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-11-20 06:50:10,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985156697] [2021-11-20 06:50:10,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:50:10,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:50:10,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:50:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:50:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:50:10,544 INFO L87 Difference]: Start difference. First operand 405 states and 492 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:50:11,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:50:11,238 INFO L93 Difference]: Finished difference Result 772 states and 948 transitions. [2021-11-20 06:50:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:50:11,238 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-11-20 06:50:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:50:11,241 INFO L225 Difference]: With dead ends: 772 [2021-11-20 06:50:11,241 INFO L226 Difference]: Without dead ends: 422 [2021-11-20 06:50:11,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:50:11,243 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 53 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:50:11,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 1951 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:50:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-20 06:50:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 414. [2021-11-20 06:50:11,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 406 states have (on average 1.2241379310344827) internal successors, (497), 408 states have internal predecessors, (497), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:50:11,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 504 transitions. [2021-11-20 06:50:11,259 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 504 transitions. Word has length 124 [2021-11-20 06:50:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:50:11,259 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 504 transitions. [2021-11-20 06:50:11,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:50:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 504 transitions. [2021-11-20 06:50:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-20 06:50:11,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:50:11,262 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:50:11,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:50:11,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:50:11,487 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:50:11,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:50:11,487 INFO L85 PathProgramCache]: Analyzing trace with hash 713499125, now seen corresponding path program 3 times [2021-11-20 06:50:11,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:50:11,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162630383] [2021-11-20 06:50:11,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:50:11,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:50:11,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:50:11,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1686824693] [2021-11-20 06:50:11,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:50:11,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:50:11,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:50:11,522 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:50:11,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c209fce8-22d1-4c83-9b04-a7abf513d2f7/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process