./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8 --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 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 16:42:57,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 16:42:57,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 16:42:57,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 16:42:57,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 16:42:57,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 16:42:57,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 16:42:57,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 16:42:57,155 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 16:42:57,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 16:42:57,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 16:42:57,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 16:42:57,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 16:42:57,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 16:42:57,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 16:42:57,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 16:42:57,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 16:42:57,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 16:42:57,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 16:42:57,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 16:42:57,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 16:42:57,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 16:42:57,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 16:42:57,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 16:42:57,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 16:42:57,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 16:42:57,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 16:42:57,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 16:42:57,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 16:42:57,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 16:42:57,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 16:42:57,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 16:42:57,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 16:42:57,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 16:42:57,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 16:42:57,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 16:42:57,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 16:42:57,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 16:42:57,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 16:42:57,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 16:42:57,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 16:42:57,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 16:42:57,191 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 16:42:57,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 16:42:57,192 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 16:42:57,192 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 16:42:57,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 16:42:57,193 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 16:42:57,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 16:42:57,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 16:42:57,193 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 16:42:57,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 16:42:57,194 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 16:42:57,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 16:42:57,195 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 16:42:57,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 16:42:57,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 16:42:57,195 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 16:42:57,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 16:42:57,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:42:57,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 16:42:57,206 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 16:42:57,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 16:42:57,207 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 16:42:57,207 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94599b38b669e42115f92cee257d9ed4ed5d4777dca7d2ee690bacb4e0d226f0 [2022-12-13 16:42:57,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 16:42:57,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 16:42:57,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 16:42:57,400 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 16:42:57,401 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 16:42:57,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-12-13 16:42:59,928 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 16:43:00,119 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 16:43:00,119 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i [2022-12-13 16:43:00,129 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/data/389d91c88/d6bf5f684aea418e9c58fb42d6f6f503/FLAG3e615ff96 [2022-12-13 16:43:00,504 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/data/389d91c88/d6bf5f684aea418e9c58fb42d6f6f503 [2022-12-13 16:43:00,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 16:43:00,515 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 16:43:00,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 16:43:00,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 16:43:00,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 16:43:00,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:43:00" (1/1) ... [2022-12-13 16:43:00,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd3f2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:00, skipping insertion in model container [2022-12-13 16:43:00,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 04:43:00" (1/1) ... [2022-12-13 16:43:00,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 16:43:00,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 16:43:00,833 WARN L237 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_711e0956-b457-4e62-a5d2-08473570675d/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-12-13 16:43:00,916 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:43:00,918 WARN L237 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_711e0956-b457-4e62-a5d2-08473570675d/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-12-13 16:43:00,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:43:00,941 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 16:43:00,963 WARN L237 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_711e0956-b457-4e62-a5d2-08473570675d/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[33021,33034] [2022-12-13 16:43:01,014 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-12-13 16:43:01,016 WARN L237 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_711e0956-b457-4e62-a5d2-08473570675d/sv-benchmarks/c/uthash-2.0.2/uthash_SFH_test5-3.i[49681,49694] [2022-12-13 16:43:01,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 16:43:01,049 INFO L208 MainTranslator]: Completed translation [2022-12-13 16:43:01,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01 WrapperNode [2022-12-13 16:43:01,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 16:43:01,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 16:43:01,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 16:43:01,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 16:43:01,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,155 INFO L138 Inliner]: procedures = 177, calls = 487, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1686 [2022-12-13 16:43:01,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 16:43:01,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 16:43:01,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 16:43:01,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 16:43:01,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 16:43:01,258 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 16:43:01,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 16:43:01,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 16:43:01,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (1/1) ... [2022-12-13 16:43:01,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 16:43:01,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:01,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 16:43:01,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 16:43:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 16:43:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-13 16:43:01,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-13 16:43:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 16:43:01,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-13 16:43:01,320 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-12-13 16:43:01,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 16:43:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 16:43:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 16:43:01,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 16:43:01,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 16:43:01,519 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 16:43:01,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 16:43:02,869 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 16:43:02,877 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 16:43:02,877 INFO L300 CfgBuilder]: Removed 100 assume(true) statements. [2022-12-13 16:43:02,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:43:02 BoogieIcfgContainer [2022-12-13 16:43:02,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 16:43:02,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 16:43:02,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 16:43:02,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 16:43:02,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 04:43:00" (1/3) ... [2022-12-13 16:43:02,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6f75d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:43:02, skipping insertion in model container [2022-12-13 16:43:02,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 04:43:01" (2/3) ... [2022-12-13 16:43:02,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e6f75d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 04:43:02, skipping insertion in model container [2022-12-13 16:43:02,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 04:43:02" (3/3) ... [2022-12-13 16:43:02,885 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_SFH_test5-3.i [2022-12-13 16:43:02,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 16:43:02,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-13 16:43:02,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 16:43:02,944 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@296ce1cb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 16:43:02,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 16:43:02,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 304 states, 288 states have (on average 1.7048611111111112) internal successors, (491), 295 states have internal predecessors, (491), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 16:43:02,953 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:02,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:02,954 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:02,958 INFO L85 PathProgramCache]: Analyzing trace with hash 678032416, now seen corresponding path program 1 times [2022-12-13 16:43:02,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:02,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186886397] [2022-12-13 16:43:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:02,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:03,055 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482683102] [2022-12-13 16:43:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:03,057 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:03,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 16:43:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:03,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 16:43:03,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:03,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:03,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:03,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186886397] [2022-12-13 16:43:03,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482683102] [2022-12-13 16:43:03,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482683102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:03,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:03,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 16:43:03,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087398423] [2022-12-13 16:43:03,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:03,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 16:43:03,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 16:43:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:43:03,261 INFO L87 Difference]: Start difference. First operand has 304 states, 288 states have (on average 1.7048611111111112) internal successors, (491), 295 states have internal predecessors, (491), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:03,309 INFO L93 Difference]: Finished difference Result 606 states and 1029 transitions. [2022-12-13 16:43:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 16:43:03,315 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 [2022-12-13 16:43:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:03,323 INFO L225 Difference]: With dead ends: 606 [2022-12-13 16:43:03,323 INFO L226 Difference]: Without dead ends: 250 [2022-12-13 16:43:03,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 16:43:03,329 INFO L413 NwaCegarLoop]: 404 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, 404 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 [2022-12-13 16:43:03,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-13 16:43:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-12-13 16:43:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 235 states have (on average 1.3148936170212766) internal successors, (309), 241 states have internal predecessors, (309), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 331 transitions. [2022-12-13 16:43:03,365 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 331 transitions. Word has length 8 [2022-12-13 16:43:03,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:03,365 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 331 transitions. [2022-12-13 16:43:03,366 INFO L496 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) [2022-12-13 16:43:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 331 transitions. [2022-12-13 16:43:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 16:43:03,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:03,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:03,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 16:43:03,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 16:43:03,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:03,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:03,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1368100487, now seen corresponding path program 1 times [2022-12-13 16:43:03,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:03,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136467282] [2022-12-13 16:43:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:03,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:03,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:03,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597511515] [2022-12-13 16:43:03,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:03,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:03,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:03,686 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:03,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 16:43:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-13 16:43:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:03,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:03,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:03,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136467282] [2022-12-13 16:43:03,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597511515] [2022-12-13 16:43:03,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597511515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:03,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:03,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775452942] [2022-12-13 16:43:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:03,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:03,885 INFO L87 Difference]: Start difference. First operand 250 states and 331 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:03,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:03,932 INFO L93 Difference]: Finished difference Result 565 states and 756 transitions. [2022-12-13 16:43:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:03,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-13 16:43:03,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:03,936 INFO L225 Difference]: With dead ends: 565 [2022-12-13 16:43:03,936 INFO L226 Difference]: Without dead ends: 487 [2022-12-13 16:43:03,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:03,938 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 294 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:03,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 686 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-12-13 16:43:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 251. [2022-12-13 16:43:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 236 states have (on average 1.3135593220338984) internal successors, (310), 242 states have internal predecessors, (310), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 332 transitions. [2022-12-13 16:43:03,960 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 332 transitions. Word has length 42 [2022-12-13 16:43:03,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 332 transitions. [2022-12-13 16:43:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 332 transitions. [2022-12-13 16:43:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:03,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:03,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:03,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 16:43:04,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:04,167 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1909784615, now seen corresponding path program 1 times [2022-12-13 16:43:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:04,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5497513] [2022-12-13 16:43:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:04,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643227591] [2022-12-13 16:43:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:04,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:04,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:04,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:04,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 16:43:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:05,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:05,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:05,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5497513] [2022-12-13 16:43:05,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643227591] [2022-12-13 16:43:05,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643227591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:05,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:05,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992809875] [2022-12-13 16:43:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:05,347 INFO L87 Difference]: Start difference. First operand 251 states and 332 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:05,430 INFO L93 Difference]: Finished difference Result 520 states and 692 transitions. [2022-12-13 16:43:05,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:05,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:05,432 INFO L225 Difference]: With dead ends: 520 [2022-12-13 16:43:05,432 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 16:43:05,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:05,433 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 9 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 607 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 [2022-12-13 16:43:05,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 16:43:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-12-13 16:43:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 256 states have (on average 1.2890625) internal successors, (330), 262 states have internal predecessors, (330), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 352 transitions. [2022-12-13 16:43:05,441 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 352 transitions. Word has length 140 [2022-12-13 16:43:05,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:05,442 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 352 transitions. [2022-12-13 16:43:05,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:05,442 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 352 transitions. [2022-12-13 16:43:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:05,444 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:05,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:05,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 16:43:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:05,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1480126309, now seen corresponding path program 1 times [2022-12-13 16:43:05,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:05,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122261690] [2022-12-13 16:43:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:05,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845768477] [2022-12-13 16:43:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:05,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:05,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:05,913 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:05,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 16:43:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:06,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 3073 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:06,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:06,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122261690] [2022-12-13 16:43:06,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:06,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845768477] [2022-12-13 16:43:06,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845768477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:06,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:06,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:06,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988701325] [2022-12-13 16:43:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:06,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:06,837 INFO L87 Difference]: Start difference. First operand 271 states and 352 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:06,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:06,913 INFO L93 Difference]: Finished difference Result 560 states and 732 transitions. [2022-12-13 16:43:06,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:06,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:06,914 INFO L225 Difference]: With dead ends: 560 [2022-12-13 16:43:06,915 INFO L226 Difference]: Without dead ends: 292 [2022-12-13 16:43:06,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:06,916 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 10 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 607 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 [2022-12-13 16:43:06,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-13 16:43:06,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-12-13 16:43:06,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 276 states have (on average 1.2681159420289856) internal successors, (350), 282 states have internal predecessors, (350), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2022-12-13 16:43:06,923 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 140 [2022-12-13 16:43:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:06,923 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2022-12-13 16:43:06,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:06,924 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2022-12-13 16:43:06,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:06,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:06,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:06,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 16:43:07,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:07,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:07,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:07,128 INFO L85 PathProgramCache]: Analyzing trace with hash -4891625, now seen corresponding path program 1 times [2022-12-13 16:43:07,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031384236] [2022-12-13 16:43:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:07,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:07,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:07,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548656654] [2022-12-13 16:43:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:07,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:07,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:07,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:07,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 16:43:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:08,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:08,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:43:08,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:08,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031384236] [2022-12-13 16:43:08,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:08,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548656654] [2022-12-13 16:43:08,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548656654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:08,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:08,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:08,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047289439] [2022-12-13 16:43:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:08,298 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:08,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:08,355 INFO L93 Difference]: Finished difference Result 389 states and 508 transitions. [2022-12-13 16:43:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:08,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:08,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:08,357 INFO L225 Difference]: With dead ends: 389 [2022-12-13 16:43:08,357 INFO L226 Difference]: Without dead ends: 312 [2022-12-13 16:43:08,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:08,358 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 9 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 607 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 [2022-12-13 16:43:08,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 607 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-13 16:43:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-12-13 16:43:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 296 states have (on average 1.25) internal successors, (370), 302 states have internal predecessors, (370), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 392 transitions. [2022-12-13 16:43:08,365 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 392 transitions. Word has length 140 [2022-12-13 16:43:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:08,365 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 392 transitions. [2022-12-13 16:43:08,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 392 transitions. [2022-12-13 16:43:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:08,367 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:08,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:08,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 16:43:08,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:08,569 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:08,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1989253081, now seen corresponding path program 1 times [2022-12-13 16:43:08,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:08,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819839138] [2022-12-13 16:43:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:08,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:08,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [932065935] [2022-12-13 16:43:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:08,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:08,708 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:08,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 16:43:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 3079 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:09,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:09,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819839138] [2022-12-13 16:43:09,655 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932065935] [2022-12-13 16:43:09,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932065935] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:09,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:09,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:43:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847739190] [2022-12-13 16:43:09,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:09,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:43:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:43:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:43:09,657 INFO L87 Difference]: Start difference. First operand 311 states and 392 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:09,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:09,718 INFO L93 Difference]: Finished difference Result 611 states and 773 transitions. [2022-12-13 16:43:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:43:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:09,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:09,719 INFO L225 Difference]: With dead ends: 611 [2022-12-13 16:43:09,719 INFO L226 Difference]: Without dead ends: 303 [2022-12-13 16:43:09,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:43:09,720 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 295 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:09,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 635 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-13 16:43:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 297. [2022-12-13 16:43:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 282 states have (on average 1.2375886524822695) internal successors, (349), 288 states have internal predecessors, (349), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 371 transitions. [2022-12-13 16:43:09,738 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 371 transitions. Word has length 140 [2022-12-13 16:43:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:09,739 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 371 transitions. [2022-12-13 16:43:09,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 371 transitions. [2022-12-13 16:43:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:09,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:09,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:09,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 16:43:09,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:09,943 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:09,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:09,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1906468619, now seen corresponding path program 1 times [2022-12-13 16:43:09,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:09,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592417217] [2022-12-13 16:43:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:09,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:10,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:10,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635005669] [2022-12-13 16:43:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:10,099 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:10,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 16:43:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:11,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:11,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:11,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:11,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:11,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592417217] [2022-12-13 16:43:11,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:11,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635005669] [2022-12-13 16:43:11,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635005669] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:11,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:11,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:43:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230909147] [2022-12-13 16:43:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:11,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:43:11,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:43:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:43:11,045 INFO L87 Difference]: Start difference. First operand 297 states and 371 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:11,119 INFO L93 Difference]: Finished difference Result 670 states and 837 transitions. [2022-12-13 16:43:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:43:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:11,121 INFO L225 Difference]: With dead ends: 670 [2022-12-13 16:43:11,121 INFO L226 Difference]: Without dead ends: 376 [2022-12-13 16:43:11,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:43:11,122 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 288 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:11,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 869 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-12-13 16:43:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 283. [2022-12-13 16:43:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 268 states have (on average 1.2238805970149254) internal successors, (328), 274 states have internal predecessors, (328), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 350 transitions. [2022-12-13 16:43:11,132 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 350 transitions. Word has length 140 [2022-12-13 16:43:11,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:11,132 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 350 transitions. [2022-12-13 16:43:11,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:11,133 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 350 transitions. [2022-12-13 16:43:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:11,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:11,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:11,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 16:43:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 16:43:11,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1296503321, now seen corresponding path program 1 times [2022-12-13 16:43:11,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:11,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122332215] [2022-12-13 16:43:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:11,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:11,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362215643] [2022-12-13 16:43:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:11,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:11,527 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:11,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 16:43:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:12,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:12,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:43:12,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:12,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:12,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122332215] [2022-12-13 16:43:12,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362215643] [2022-12-13 16:43:12,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362215643] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:12,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:12,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:43:12,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423634291] [2022-12-13 16:43:12,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:12,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:43:12,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:12,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:43:12,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:43:12,732 INFO L87 Difference]: Start difference. First operand 283 states and 350 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:12,779 INFO L93 Difference]: Finished difference Result 371 states and 466 transitions. [2022-12-13 16:43:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:43:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:12,781 INFO L225 Difference]: With dead ends: 371 [2022-12-13 16:43:12,781 INFO L226 Difference]: Without dead ends: 274 [2022-12-13 16:43:12,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:43:12,782 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 88 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:12,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 801 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-12-13 16:43:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 269. [2022-12-13 16:43:12,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 254 states have (on average 1.2086614173228347) internal successors, (307), 260 states have internal predecessors, (307), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 329 transitions. [2022-12-13 16:43:12,789 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 329 transitions. Word has length 140 [2022-12-13 16:43:12,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:12,789 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 329 transitions. [2022-12-13 16:43:12,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:12,789 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 329 transitions. [2022-12-13 16:43:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:12,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:12,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:12,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 16:43:12,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:12,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:12,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1580490231, now seen corresponding path program 1 times [2022-12-13 16:43:12,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:12,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065628340] [2022-12-13 16:43:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:12,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:13,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:13,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980197322] [2022-12-13 16:43:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:13,140 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:13,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 16:43:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:14,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 3035 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 16:43:14,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 16:43:14,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065628340] [2022-12-13 16:43:14,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980197322] [2022-12-13 16:43:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980197322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:14,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:14,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 16:43:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424267392] [2022-12-13 16:43:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:14,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 16:43:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 16:43:14,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 16:43:14,375 INFO L87 Difference]: Start difference. First operand 269 states and 329 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:14,405 INFO L93 Difference]: Finished difference Result 347 states and 425 transitions. [2022-12-13 16:43:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 16:43:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:14,407 INFO L225 Difference]: With dead ends: 347 [2022-12-13 16:43:14,407 INFO L226 Difference]: Without dead ends: 264 [2022-12-13 16:43:14,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 16:43:14,408 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 63 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:14,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 795 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:14,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-13 16:43:14,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2022-12-13 16:43:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 245 states have (on average 1.1959183673469387) internal successors, (293), 251 states have internal predecessors, (293), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-13 16:43:14,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2022-12-13 16:43:14,416 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 140 [2022-12-13 16:43:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:14,416 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2022-12-13 16:43:14,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:14,416 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2022-12-13 16:43:14,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-13 16:43:14,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:14,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:14,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 16:43:14,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:14,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash 413654475, now seen corresponding path program 1 times [2022-12-13 16:43:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212094532] [2022-12-13 16:43:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:14,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:14,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832420385] [2022-12-13 16:43:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:14,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:14,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:14,766 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 16:43:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:15,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 16:43:15,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:16,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212094532] [2022-12-13 16:43:16,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832420385] [2022-12-13 16:43:16,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832420385] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:16,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:43:16,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-12-13 16:43:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440088239] [2022-12-13 16:43:16,143 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:16,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 16:43:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 16:43:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:43:16,145 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:16,247 INFO L93 Difference]: Finished difference Result 1005 states and 1227 transitions. [2022-12-13 16:43:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 16:43:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2022-12-13 16:43:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:16,250 INFO L225 Difference]: With dead ends: 1005 [2022-12-13 16:43:16,251 INFO L226 Difference]: Without dead ends: 930 [2022-12-13 16:43:16,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 16:43:16,252 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 1215 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1254 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:16,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1254 Valid, 1173 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:16,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2022-12-13 16:43:16,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 794. [2022-12-13 16:43:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 761 states have (on average 1.1892247043363995) internal successors, (905), 767 states have internal predecessors, (905), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2022-12-13 16:43:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 963 transitions. [2022-12-13 16:43:16,274 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 963 transitions. Word has length 140 [2022-12-13 16:43:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:16,275 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 963 transitions. [2022-12-13 16:43:16,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 963 transitions. [2022-12-13 16:43:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-12-13 16:43:16,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:16,281 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:16,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 16:43:16,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:16,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:16,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:16,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1488887653, now seen corresponding path program 2 times [2022-12-13 16:43:16,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:16,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855667332] [2022-12-13 16:43:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:16,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:16,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [738414468] [2022-12-13 16:43:16,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 16:43:16,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:16,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:16,879 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 16:43:19,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 16:43:19,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:20,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 11749 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 16:43:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:20,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 16:43:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 16:43:20,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855667332] [2022-12-13 16:43:20,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:20,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738414468] [2022-12-13 16:43:20,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738414468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 16:43:20,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 16:43:20,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-12-13 16:43:20,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814349213] [2022-12-13 16:43:20,684 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 16:43:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 16:43:20,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:20,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 16:43:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:43:20,687 INFO L87 Difference]: Start difference. First operand 794 states and 963 transitions. Second operand has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:21,018 INFO L93 Difference]: Finished difference Result 2277 states and 2781 transitions. [2022-12-13 16:43:21,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 16:43:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2022-12-13 16:43:21,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:21,027 INFO L225 Difference]: With dead ends: 2277 [2022-12-13 16:43:21,027 INFO L226 Difference]: Without dead ends: 2202 [2022-12-13 16:43:21,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-12-13 16:43:21,029 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 2413 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2503 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:21,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2503 Valid, 3000 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 16:43:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-12-13 16:43:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1862. [2022-12-13 16:43:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1793 states have (on average 1.1873954266592304) internal successors, (2129), 1799 states have internal predecessors, (2129), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-13 16:43:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2259 transitions. [2022-12-13 16:43:21,096 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2259 transitions. Word has length 434 [2022-12-13 16:43:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:21,097 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2259 transitions. [2022-12-13 16:43:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 16:43:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2259 transitions. [2022-12-13 16:43:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2022-12-13 16:43:21,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:21,132 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:21,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 16:43:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:21,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:21,333 INFO L85 PathProgramCache]: Analyzing trace with hash -268896231, now seen corresponding path program 3 times [2022-12-13 16:43:21,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:21,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294406582] [2022-12-13 16:43:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:21,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:22,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:22,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356160809] [2022-12-13 16:43:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 16:43:22,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:22,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:22,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:22,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 16:43:26,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 16:43:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 16:43:26,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:43:26,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 3852 trivial. 0 not checked. [2022-12-13 16:43:28,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:28,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294406582] [2022-12-13 16:43:28,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356160809] [2022-12-13 16:43:28,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356160809] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:28,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:28,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614642235] [2022-12-13 16:43:28,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:28,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:28,514 INFO L87 Difference]: Start difference. First operand 1862 states and 2259 transitions. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-12-13 16:43:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:28,598 INFO L93 Difference]: Finished difference Result 3666 states and 4452 transitions. [2022-12-13 16:43:28,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:28,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1022 [2022-12-13 16:43:28,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:28,606 INFO L225 Difference]: With dead ends: 3666 [2022-12-13 16:43:28,606 INFO L226 Difference]: Without dead ends: 1860 [2022-12-13 16:43:28,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:28,610 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 15 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:28,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 587 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:28,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-12-13 16:43:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1860. [2022-12-13 16:43:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1791 states have (on average 1.1870463428252374) internal successors, (2126), 1797 states have internal predecessors, (2126), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2022-12-13 16:43:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2256 transitions. [2022-12-13 16:43:28,693 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2256 transitions. Word has length 1022 [2022-12-13 16:43:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:28,694 INFO L495 AbstractCegarLoop]: Abstraction has 1860 states and 2256 transitions. [2022-12-13 16:43:28,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 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) [2022-12-13 16:43:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2256 transitions. [2022-12-13 16:43:28,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2022-12-13 16:43:28,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:28,708 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:28,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 16:43:28,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:28,909 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1529978106, now seen corresponding path program 1 times [2022-12-13 16:43:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827898278] [2022-12-13 16:43:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:29,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:29,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33843436] [2022-12-13 16:43:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:29,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:29,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:29,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:29,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 16:43:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:39,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 28310 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:43:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 730 proven. 0 refuted. 0 times theorem prover too weak. 3676 trivial. 0 not checked. [2022-12-13 16:43:39,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:39,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827898278] [2022-12-13 16:43:39,261 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33843436] [2022-12-13 16:43:39,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33843436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:39,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:39,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:39,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686869782] [2022-12-13 16:43:39,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:39,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:39,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:39,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:39,263 INFO L87 Difference]: Start difference. First operand 1860 states and 2256 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-12-13 16:43:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:39,345 INFO L93 Difference]: Finished difference Result 3629 states and 4406 transitions. [2022-12-13 16:43:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1037 [2022-12-13 16:43:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:39,351 INFO L225 Difference]: With dead ends: 3629 [2022-12-13 16:43:39,352 INFO L226 Difference]: Without dead ends: 1910 [2022-12-13 16:43:39,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:39,355 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 105 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:39,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 622 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 16:43:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-12-13 16:43:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1908. [2022-12-13 16:43:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1834 states have (on average 1.1853871319520175) internal successors, (2174), 1845 states have internal predecessors, (2174), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2022-12-13 16:43:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2314 transitions. [2022-12-13 16:43:39,416 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2314 transitions. Word has length 1037 [2022-12-13 16:43:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:39,416 INFO L495 AbstractCegarLoop]: Abstraction has 1908 states and 2314 transitions. [2022-12-13 16:43:39,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 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) [2022-12-13 16:43:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2314 transitions. [2022-12-13 16:43:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2022-12-13 16:43:39,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:39,429 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:39,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 16:43:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 16:43:39,630 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:39,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:39,630 INFO L85 PathProgramCache]: Analyzing trace with hash -685791536, now seen corresponding path program 1 times [2022-12-13 16:43:39,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:39,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289102073] [2022-12-13 16:43:39,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:39,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:40,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:40,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846512725] [2022-12-13 16:43:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:40,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:40,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:40,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:40,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 16:43:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 16:43:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 27447 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 16:43:49,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 16:43:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2022-12-13 16:43:51,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 16:43:51,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 16:43:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289102073] [2022-12-13 16:43:51,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 16:43:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846512725] [2022-12-13 16:43:51,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846512725] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 16:43:51,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 16:43:51,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 16:43:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026946925] [2022-12-13 16:43:51,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 16:43:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 16:43:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 16:43:51,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 16:43:51,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:51,216 INFO L87 Difference]: Start difference. First operand 1908 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:43:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 16:43:51,326 INFO L93 Difference]: Finished difference Result 4737 states and 5750 transitions. [2022-12-13 16:43:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 16:43:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1052 [2022-12-13 16:43:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 16:43:51,332 INFO L225 Difference]: With dead ends: 4737 [2022-12-13 16:43:51,332 INFO L226 Difference]: Without dead ends: 3317 [2022-12-13 16:43:51,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 16:43:51,334 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 127 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 16:43:51,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 760 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 16:43:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3317 states. [2022-12-13 16:43:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3317 to 3315. [2022-12-13 16:43:51,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3208 states have (on average 1.186720698254364) internal successors, (3807), 3219 states have internal predecessors, (3807), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2022-12-13 16:43:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 4013 transitions. [2022-12-13 16:43:51,402 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 4013 transitions. Word has length 1052 [2022-12-13 16:43:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 16:43:51,403 INFO L495 AbstractCegarLoop]: Abstraction has 3315 states and 4013 transitions. [2022-12-13 16:43:51,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 16:43:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 4013 transitions. [2022-12-13 16:43:51,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-12-13 16:43:51,418 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 16:43:51,419 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 16:43:51,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 16:43:51,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 16:43:51,619 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 16:43:51,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 16:43:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash -646663346, now seen corresponding path program 1 times [2022-12-13 16:43:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 16:43:51,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815955759] [2022-12-13 16:43:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 16:43:52,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 16:43:52,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278369347] [2022-12-13 16:43:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 16:43:52,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 16:43:52,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 16:43:52,844 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 16:43:52,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_711e0956-b457-4e62-a5d2-08473570675d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process