./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c --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_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/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_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/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_3e76319b-28b3-4e28-a146-e86ee847dbff/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 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee --- 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 11:49:14,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:49:14,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:49:14,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:49:14,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:49:14,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:49:14,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:49:14,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:49:14,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:49:14,238 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:49:14,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:49:14,240 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:49:14,241 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:49:14,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:49:14,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:49:14,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:49:14,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:49:14,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:49:14,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:49:14,249 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:49:14,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:49:14,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:49:14,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:49:14,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:49:14,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:49:14,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:49:14,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:49:14,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:49:14,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:49:14,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:49:14,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:49:14,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:49:14,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:49:14,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:49:14,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:49:14,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:49:14,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:49:14,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:49:14,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:49:14,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:49:14,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:49:14,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 11:49:14,282 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:49:14,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:49:14,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:49:14,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:49:14,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:49:14,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:49:14,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:49:14,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:49:14,284 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 11:49:14,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:49:14,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:49:14,286 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:49:14,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 11:49:14,287 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:49:14,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:49:14,287 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:49:14,287 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_3e76319b-28b3-4e28-a146-e86ee847dbff/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a46b64c20324a7544dfe7936b5f39eaa32bba659068797748195a7f292bdaee [2022-12-13 11:49:14,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:49:14,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:49:14,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:49:14,474 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:49:14,474 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:49:14,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-12-13 11:49:17,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:49:17,114 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:49:17,114 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c [2022-12-13 11:49:17,118 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/data/c058ba0fd/384b501e11ed4487ad1faf6fd809524e/FLAGf8b13ebe3 [2022-12-13 11:49:17,129 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/data/c058ba0fd/384b501e11ed4487ad1faf6fd809524e [2022-12-13 11:49:17,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:49:17,131 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:49:17,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:49:17,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:49:17,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:49:17,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50205f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17, skipping insertion in model container [2022-12-13 11:49:17,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:49:17,153 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:49:17,252 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_3e76319b-28b3-4e28-a146-e86ee847dbff/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-12-13 11:49:17,265 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:49:17,271 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:49:17,280 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_3e76319b-28b3-4e28-a146-e86ee847dbff/sv-benchmarks/c/array-multidimensional/copy-partial-2-n-u.c[416,429] [2022-12-13 11:49:17,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:49:17,295 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:49:17,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17 WrapperNode [2022-12-13 11:49:17,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:49:17,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:49:17,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:49:17,296 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:49:17,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,306 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,319 INFO L138 Inliner]: procedures = 15, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2022-12-13 11:49:17,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:49:17,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:49:17,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:49:17,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:49:17,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,336 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,338 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:49:17,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:49:17,339 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:49:17,339 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:49:17,339 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (1/1) ... [2022-12-13 11:49:17,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:49:17,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:17,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:49:17,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:49:17,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 11:49:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:49:17,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:49:17,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:49:17,453 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:49:17,454 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:49:17,570 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:49:17,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:49:17,576 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 11:49:17,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:49:17 BoogieIcfgContainer [2022-12-13 11:49:17,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:49:17,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:49:17,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:49:17,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:49:17,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:49:17" (1/3) ... [2022-12-13 11:49:17,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68494a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:49:17, skipping insertion in model container [2022-12-13 11:49:17,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:49:17" (2/3) ... [2022-12-13 11:49:17,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68494a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:49:17, skipping insertion in model container [2022-12-13 11:49:17,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:49:17" (3/3) ... [2022-12-13 11:49:17,584 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2022-12-13 11:49:17,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:49:17,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 11:49:17,632 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:49:17,636 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;@2af5a78b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:49:17,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 11:49:17,639 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:17,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 11:49:17,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:17,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:17,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash -897666833, now seen corresponding path program 1 times [2022-12-13 11:49:17,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955186095] [2022-12-13 11:49:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:17,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633722859] [2022-12-13 11:49:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:17,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:17,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:17,752 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:17,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:49:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:17,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 11:49:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 11:49:17,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:17,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:17,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955186095] [2022-12-13 11:49:17,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633722859] [2022-12-13 11:49:17,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633722859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:17,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:17,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:49:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225593485] [2022-12-13 11:49:17,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:17,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 11:49:17,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:17,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 11:49:17,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 11:49:17,880 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:17,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:17,897 INFO L93 Difference]: Finished difference Result 53 states and 82 transitions. [2022-12-13 11:49:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 11:49:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-12-13 11:49:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:17,905 INFO L225 Difference]: With dead ends: 53 [2022-12-13 11:49:17,906 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 11:49:17,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 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 11:49:17,912 INFO L413 NwaCegarLoop]: 34 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, 34 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 11:49:17,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 11:49:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 11:49:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-12-13 11:49:17,948 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 21 [2022-12-13 11:49:17,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:17,949 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-12-13 11:49:17,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:17,949 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-12-13 11:49:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 11:49:17,951 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:17,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:17,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:49:18,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 11:49:18,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2067117999, now seen corresponding path program 1 times [2022-12-13 11:49:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042290501] [2022-12-13 11:49:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:18,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:18,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160800987] [2022-12-13 11:49:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:18,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:18,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:18,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:18,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:49:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:49:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:49:18,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:18,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042290501] [2022-12-13 11:49:18,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:18,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160800987] [2022-12-13 11:49:18,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160800987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:18,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:18,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:49:18,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034336271] [2022-12-13 11:49:18,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:49:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:49:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:18,297 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 11:49:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:18,350 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-12-13 11:49:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:49:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 21 [2022-12-13 11:49:18,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:18,351 INFO L225 Difference]: With dead ends: 50 [2022-12-13 11:49:18,351 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 11:49:18,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:18,352 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:18,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 36 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 11:49:18,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-12-13 11:49:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-12-13 11:49:18,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 21 [2022-12-13 11:49:18,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:18,359 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-12-13 11:49:18,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 11:49:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-12-13 11:49:18,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 11:49:18,360 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:18,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:18,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:49:18,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 11:49:18,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:18,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1849346137, now seen corresponding path program 1 times [2022-12-13 11:49:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481225727] [2022-12-13 11:49:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:18,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137557800] [2022-12-13 11:49:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:18,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:18,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:18,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:49:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:18,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:49:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:49:18,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:18,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481225727] [2022-12-13 11:49:18,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:18,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137557800] [2022-12-13 11:49:18,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137557800] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:18,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:18,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:49:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240483602] [2022-12-13 11:49:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:18,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:49:18,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:49:18,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:18,753 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 11:49:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:18,789 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2022-12-13 11:49:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:49:18,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 24 [2022-12-13 11:49:18,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:18,790 INFO L225 Difference]: With dead ends: 52 [2022-12-13 11:49:18,790 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 11:49:18,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:18,791 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:18,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 41 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 11:49:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-12-13 11:49:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-12-13 11:49:18,797 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 24 [2022-12-13 11:49:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:18,798 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-12-13 11:49:18,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 11:49:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-12-13 11:49:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 11:49:18,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:18,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:18,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:49:18,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:19,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2114191326, now seen corresponding path program 1 times [2022-12-13 11:49:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:19,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359094455] [2022-12-13 11:49:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:19,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:19,035 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468086012] [2022-12-13 11:49:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:19,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:19,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:19,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:19,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:49:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:19,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:49:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:49:19,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 11:49:19,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359094455] [2022-12-13 11:49:19,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:19,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468086012] [2022-12-13 11:49:19,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468086012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:19,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:19,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 11:49:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364236479] [2022-12-13 11:49:19,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:49:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:49:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:49:19,248 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:19,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:19,346 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2022-12-13 11:49:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:49:19,346 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-12-13 11:49:19,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:19,348 INFO L225 Difference]: With dead ends: 89 [2022-12-13 11:49:19,348 INFO L226 Difference]: Without dead ends: 73 [2022-12-13 11:49:19,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:49:19,349 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:19,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 64 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:49:19,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-13 11:49:19,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2022-12-13 11:49:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-12-13 11:49:19,356 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 25 [2022-12-13 11:49:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:19,356 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-12-13 11:49:19,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-12-13 11:49:19,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 11:49:19,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:19,357 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:19,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 11:49:19,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:19,559 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:19,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:19,560 INFO L85 PathProgramCache]: Analyzing trace with hash 256970087, now seen corresponding path program 2 times [2022-12-13 11:49:19,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:19,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014861504] [2022-12-13 11:49:19,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:19,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:19,604 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:19,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138161868] [2022-12-13 11:49:19,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:49:19,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:19,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:19,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:19,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:49:19,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:49:19,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:19,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:49:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 11:49:19,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:19,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:19,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014861504] [2022-12-13 11:49:19,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138161868] [2022-12-13 11:49:19,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138161868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:19,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:19,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 11:49:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131857813] [2022-12-13 11:49:19,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:19,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:49:19,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:49:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:19,776 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 11:49:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:19,817 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-12-13 11:49:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:49:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 28 [2022-12-13 11:49:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:19,818 INFO L225 Difference]: With dead ends: 53 [2022-12-13 11:49:19,818 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 11:49:19,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:49:19,819 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:19,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 11:49:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2022-12-13 11:49:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-13 11:49:19,825 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 28 [2022-12-13 11:49:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:19,825 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-13 11:49:19,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 11:49:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-13 11:49:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 11:49:19,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:19,826 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:19,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:49:20,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:20,027 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1830663741, now seen corresponding path program 1 times [2022-12-13 11:49:20,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:20,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743683969] [2022-12-13 11:49:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:20,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:20,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:20,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009123280] [2022-12-13 11:49:20,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:20,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:20,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:20,066 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:20,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 11:49:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:20,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 11:49:20,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:49:20,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:49:20,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743683969] [2022-12-13 11:49:20,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009123280] [2022-12-13 11:49:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009123280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:20,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:20,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-13 11:49:20,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021343268] [2022-12-13 11:49:20,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:20,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 11:49:20,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:20,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 11:49:20,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-12-13 11:49:20,331 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:20,577 INFO L93 Difference]: Finished difference Result 166 states and 213 transitions. [2022-12-13 11:49:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:49:20,578 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-12-13 11:49:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:20,579 INFO L225 Difference]: With dead ends: 166 [2022-12-13 11:49:20,579 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 11:49:20,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-12-13 11:49:20,580 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 329 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:20,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 114 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:49:20,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 11:49:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 36. [2022-12-13 11:49:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:20,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-13 11:49:20,587 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 31 [2022-12-13 11:49:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:20,588 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-13 11:49:20,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:20,588 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-13 11:49:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 11:49:20,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:20,589 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:20,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 11:49:20,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:20,790 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:20,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:20,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1107716387, now seen corresponding path program 2 times [2022-12-13 11:49:20,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:20,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369314033] [2022-12-13 11:49:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:20,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:20,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595361203] [2022-12-13 11:49:20,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:49:20,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:20,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:20,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:20,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 11:49:20,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:49:20,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:20,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 11:49:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:49:21,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 11:49:21,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369314033] [2022-12-13 11:49:21,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:21,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595361203] [2022-12-13 11:49:21,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595361203] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:21,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:21,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-13 11:49:21,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48095533] [2022-12-13 11:49:21,152 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:21,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:49:21,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:49:21,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-12-13 11:49:21,153 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:21,721 INFO L93 Difference]: Finished difference Result 316 states and 405 transitions. [2022-12-13 11:49:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 11:49:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2022-12-13 11:49:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:21,723 INFO L225 Difference]: With dead ends: 316 [2022-12-13 11:49:21,723 INFO L226 Difference]: Without dead ends: 290 [2022-12-13 11:49:21,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 11:49:21,725 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1146 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:21,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 195 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 11:49:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-13 11:49:21,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 48. [2022-12-13 11:49:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:21,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-12-13 11:49:21,740 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2022-12-13 11:49:21,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:21,740 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-12-13 11:49:21,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-12-13 11:49:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 11:49:21,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:21,742 INFO L195 NwaCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:21,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 11:49:21,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:21,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:21,943 INFO L85 PathProgramCache]: Analyzing trace with hash 633180131, now seen corresponding path program 3 times [2022-12-13 11:49:21,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:21,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474556038] [2022-12-13 11:49:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:21,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:21,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:21,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818849561] [2022-12-13 11:49:21,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:49:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:21,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:21,962 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:21,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 11:49:22,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:49:22,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:49:22,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-12-13 11:49:22,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-12-13 11:49:22,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474556038] [2022-12-13 11:49:22,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818849561] [2022-12-13 11:49:22,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818849561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:22,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:22,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 11:49:22,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864366734] [2022-12-13 11:49:22,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:22,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:49:22,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:22,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:49:22,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:49:22,128 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:22,219 INFO L93 Difference]: Finished difference Result 178 states and 204 transitions. [2022-12-13 11:49:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:49:22,219 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-12-13 11:49:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:22,220 INFO L225 Difference]: With dead ends: 178 [2022-12-13 11:49:22,220 INFO L226 Difference]: Without dead ends: 165 [2022-12-13 11:49:22,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:49:22,221 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:22,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 71 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-12-13 11:49:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2022-12-13 11:49:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.0756302521008403) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2022-12-13 11:49:22,235 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 49 [2022-12-13 11:49:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:22,236 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2022-12-13 11:49:22,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2022-12-13 11:49:22,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 11:49:22,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:22,238 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:22,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 11:49:22,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:22,440 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1798415483, now seen corresponding path program 4 times [2022-12-13 11:49:22,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:22,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419326772] [2022-12-13 11:49:22,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:22,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:22,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:22,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877876822] [2022-12-13 11:49:22,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:49:22,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:22,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:22,477 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:22,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 11:49:22,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:49:22,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:49:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4207 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4206 trivial. 0 not checked. [2022-12-13 11:49:22,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:49:22,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:22,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419326772] [2022-12-13 11:49:22,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:22,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877876822] [2022-12-13 11:49:22,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877876822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:22,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:22,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 11:49:22,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403960897] [2022-12-13 11:49:22,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 11:49:22,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:22,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 11:49:22,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 11:49:22,601 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 11:49:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:22,662 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2022-12-13 11:49:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:49:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 124 [2022-12-13 11:49:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:22,664 INFO L225 Difference]: With dead ends: 153 [2022-12-13 11:49:22,664 INFO L226 Difference]: Without dead ends: 130 [2022-12-13 11:49:22,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:49:22,665 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:22,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 70 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 11:49:22,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-13 11:49:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-12-13 11:49:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 121 states have (on average 1.0743801652892562) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:22,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 134 transitions. [2022-12-13 11:49:22,680 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 134 transitions. Word has length 124 [2022-12-13 11:49:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:22,681 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 134 transitions. [2022-12-13 11:49:22,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 11:49:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 134 transitions. [2022-12-13 11:49:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-13 11:49:22,682 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:22,682 INFO L195 NwaCegarLoop]: trace histogram [88, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:22,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 11:49:22,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:22,884 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:22,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1395447138, now seen corresponding path program 1 times [2022-12-13 11:49:22,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:22,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970900716] [2022-12-13 11:49:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:22,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:22,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809687637] [2022-12-13 11:49:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:22,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:22,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:22,953 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:22,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 11:49:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:23,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 11:49:23,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2022-12-13 11:49:23,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4208 backedges. 1591 proven. 253 refuted. 0 times theorem prover too weak. 2364 trivial. 0 not checked. [2022-12-13 11:49:23,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970900716] [2022-12-13 11:49:23,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:23,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809687637] [2022-12-13 11:49:23,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809687637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:23,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:23,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-12-13 11:49:23,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836100900] [2022-12-13 11:49:23,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:23,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 11:49:23,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:23,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 11:49:23,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 11:49:23,822 INFO L87 Difference]: Start difference. First operand 125 states and 134 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:25,533 INFO L93 Difference]: Finished difference Result 813 states and 1060 transitions. [2022-12-13 11:49:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 11:49:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 125 [2022-12-13 11:49:25,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:25,535 INFO L225 Difference]: With dead ends: 813 [2022-12-13 11:49:25,535 INFO L226 Difference]: Without dead ends: 721 [2022-12-13 11:49:25,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 11:49:25,537 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2051 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:25,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2051 Valid, 325 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 11:49:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-12-13 11:49:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 221. [2022-12-13 11:49:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 217 states have (on average 1.0414746543778801) internal successors, (226), 217 states have internal predecessors, (226), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2022-12-13 11:49:25,560 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 125 [2022-12-13 11:49:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:25,560 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2022-12-13 11:49:25,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2022-12-13 11:49:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-13 11:49:25,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:25,562 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:25,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 11:49:25,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:49:25,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:25,764 INFO L85 PathProgramCache]: Analyzing trace with hash -387556706, now seen corresponding path program 2 times [2022-12-13 11:49:25,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:25,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844531173] [2022-12-13 11:49:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:25,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:25,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:25,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496799214] [2022-12-13 11:49:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:49:25,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:25,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:25,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:25,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 11:49:26,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:49:26,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 11:49:26,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2022-12-13 11:49:27,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17600 backedges. 6631 proven. 1081 refuted. 0 times theorem prover too weak. 9888 trivial. 0 not checked. [2022-12-13 11:49:28,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:28,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844531173] [2022-12-13 11:49:28,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:28,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496799214] [2022-12-13 11:49:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496799214] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-12-13 11:49:28,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208919991] [2022-12-13 11:49:28,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:28,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-12-13 11:49:28,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-12-13 11:49:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 11:49:28,784 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:39,116 INFO L93 Difference]: Finished difference Result 1605 states and 2092 transitions. [2022-12-13 11:49:39,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-13 11:49:39,116 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 221 [2022-12-13 11:49:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:39,119 INFO L225 Difference]: With dead ends: 1605 [2022-12-13 11:49:39,119 INFO L226 Difference]: Without dead ends: 1441 [2022-12-13 11:49:39,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-12-13 11:49:39,123 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 4128 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 2775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4128 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2775 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:39,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4128 Valid, 611 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2775 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 11:49:39,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-12-13 11:49:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 413. [2022-12-13 11:49:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 409 states have (on average 1.02200488997555) internal successors, (418), 409 states have internal predecessors, (418), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 422 transitions. [2022-12-13 11:49:39,171 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 422 transitions. Word has length 221 [2022-12-13 11:49:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:39,172 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 422 transitions. [2022-12-13 11:49:39,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 98 states have internal predecessors, (120), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 422 transitions. [2022-12-13 11:49:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-12-13 11:49:39,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:39,176 INFO L195 NwaCegarLoop]: trace histogram [376, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:39,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 11:49:39,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 11:49:39,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1904821602, now seen corresponding path program 3 times [2022-12-13 11:49:39,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427972620] [2022-12-13 11:49:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:39,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:39,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:39,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701502370] [2022-12-13 11:49:39,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:49:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:39,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:39,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 11:49:39,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 11:49:39,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:39,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 11:49:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2022-12-13 11:49:40,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72032 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72031 trivial. 0 not checked. [2022-12-13 11:49:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427972620] [2022-12-13 11:49:40,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:40,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701502370] [2022-12-13 11:49:40,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701502370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:40,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:40,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 11:49:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112133472] [2022-12-13 11:49:40,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:40,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:49:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:49:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:49:40,424 INFO L87 Difference]: Start difference. First operand 413 states and 422 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:40,581 INFO L93 Difference]: Finished difference Result 555 states and 575 transitions. [2022-12-13 11:49:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:49:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 413 [2022-12-13 11:49:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:40,583 INFO L225 Difference]: With dead ends: 555 [2022-12-13 11:49:40,583 INFO L226 Difference]: Without dead ends: 546 [2022-12-13 11:49:40,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 11:49:40,584 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:40,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 57 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:49:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-12-13 11:49:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 425. [2022-12-13 11:49:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.0285035629453683) internal successors, (433), 421 states have internal predecessors, (433), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 437 transitions. [2022-12-13 11:49:40,648 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 437 transitions. Word has length 413 [2022-12-13 11:49:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:40,649 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 437 transitions. [2022-12-13 11:49:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 11:49:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 437 transitions. [2022-12-13 11:49:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-12-13 11:49:40,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:40,653 INFO L195 NwaCegarLoop]: trace histogram [376, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:40,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 11:49:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 11:49:40,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:40,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 755995755, now seen corresponding path program 4 times [2022-12-13 11:49:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:40,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249574768] [2022-12-13 11:49:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:40,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:40,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095482715] [2022-12-13 11:49:40,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:49:40,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:40,951 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:40,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 11:49:41,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:49:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:49:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:49:41,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:49:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2022-12-13 11:49:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:49:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 72074 backedges. 40 proven. 54169 refuted. 0 times theorem prover too weak. 17865 trivial. 0 not checked. [2022-12-13 11:49:43,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249574768] [2022-12-13 11:49:43,468 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 11:49:43,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095482715] [2022-12-13 11:49:43,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095482715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:49:43,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:49:43,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-12-13 11:49:43,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527279252] [2022-12-13 11:49:43,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:49:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 11:49:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 11:49:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-12-13 11:49:43,470 INFO L87 Difference]: Start difference. First operand 425 states and 437 transitions. Second operand has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 11:49:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 11:49:43,970 INFO L93 Difference]: Finished difference Result 695 states and 724 transitions. [2022-12-13 11:49:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 11:49:43,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 425 [2022-12-13 11:49:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 11:49:43,973 INFO L225 Difference]: With dead ends: 695 [2022-12-13 11:49:43,973 INFO L226 Difference]: Without dead ends: 668 [2022-12-13 11:49:43,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 823 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=1071, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 11:49:43,973 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 259 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 11:49:43,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 144 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 11:49:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-12-13 11:49:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 522. [2022-12-13 11:49:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 518 states have (on average 1.0250965250965252) internal successors, (531), 518 states have internal predecessors, (531), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 11:49:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 535 transitions. [2022-12-13 11:49:44,046 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 535 transitions. Word has length 425 [2022-12-13 11:49:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 11:49:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 535 transitions. [2022-12-13 11:49:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 24 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 11:49:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 535 transitions. [2022-12-13 11:49:44,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-12-13 11:49:44,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 11:49:44,049 INFO L195 NwaCegarLoop]: trace histogram [470, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:44,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 11:49:44,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 11:49:44,250 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 11:49:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:44,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1331553155, now seen corresponding path program 5 times [2022-12-13 11:49:44,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:44,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140151603] [2022-12-13 11:49:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:44,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:44,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 11:49:44,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828744311] [2022-12-13 11:49:44,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 11:49:44,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:49:44,380 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:49:44,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e76319b-28b3-4e28-a146-e86ee847dbff/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process