./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.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_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/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_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/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_96be618e-1785-4c2d-8eed-42b4a2a9177b/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 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 --- 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 20:36:00,927 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:36:00,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:36:00,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:36:00,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:36:00,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:36:00,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:36:00,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:36:00,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:36:00,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:36:00,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:36:00,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:36:00,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:36:00,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:36:00,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:36:00,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:36:00,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:36:00,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:36:00,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:36:00,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:36:00,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:36:00,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:36:00,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:36:00,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:36:00,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:36:00,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:36:00,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:36:00,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:36:00,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:36:00,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:36:00,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:36:00,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:36:00,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:36:00,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:36:00,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:36:00,977 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:36:00,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:36:00,978 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:36:00,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:36:00,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:36:00,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:36:00,980 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:36:01,007 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:36:01,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:36:01,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:36:01,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:36:01,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:36:01,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:36:01,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:36:01,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:36:01,013 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:36:01,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:36:01,013 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:36:01,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:36:01,015 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:36:01,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:36:01,015 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:36:01,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:36:01,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:36:01,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:36:01,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:36:01,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:36:01,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:36:01,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:36:01,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:36:01,016 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:36:01,017 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:36:01,017 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_96be618e-1785-4c2d-8eed-42b4a2a9177b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0189dbb29c824fc5d22409df9775c70fa543bd61c2bf554681db703f0a461966 [2022-12-13 20:36:01,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:36:01,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:36:01,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:36:01,231 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:36:01,232 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:36:01,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2022-12-13 20:36:03,888 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:36:04,016 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:36:04,016 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/sv-benchmarks/c/recursive-simple/sum_25x0-2.c [2022-12-13 20:36:04,020 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/data/a6f9845d7/b98d2d07fb6446fa8c2542fe8392014e/FLAG9d10ee3df [2022-12-13 20:36:04,031 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/data/a6f9845d7/b98d2d07fb6446fa8c2542fe8392014e [2022-12-13 20:36:04,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:36:04,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:36:04,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:36:04,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:36:04,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:36:04,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7e1e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04, skipping insertion in model container [2022-12-13 20:36:04,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:36:04,053 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:36:04,155 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_96be618e-1785-4c2d-8eed-42b4a2a9177b/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2022-12-13 20:36:04,158 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:36:04,166 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:36:04,175 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_96be618e-1785-4c2d-8eed-42b4a2a9177b/sv-benchmarks/c/recursive-simple/sum_25x0-2.c[481,494] [2022-12-13 20:36:04,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:36:04,185 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:36:04,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04 WrapperNode [2022-12-13 20:36:04,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:36:04,186 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:36:04,186 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:36:04,186 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:36:04,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,207 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-12-13 20:36:04,207 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:36:04,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:36:04,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:36:04,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:36:04,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,217 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:36:04,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:36:04,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:36:04,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:36:04,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (1/1) ... [2022-12-13 20:36:04,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:36:04,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:04,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:36:04,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:36:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:36:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:36:04,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:36:04,266 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2022-12-13 20:36:04,267 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2022-12-13 20:36:04,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:36:04,319 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:36:04,320 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:36:04,380 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:36:04,384 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:36:04,384 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 20:36:04,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:36:04 BoogieIcfgContainer [2022-12-13 20:36:04,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:36:04,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:36:04,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:36:04,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:36:04,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:36:04" (1/3) ... [2022-12-13 20:36:04,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b8eac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:36:04, skipping insertion in model container [2022-12-13 20:36:04,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:36:04" (2/3) ... [2022-12-13 20:36:04,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74b8eac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:36:04, skipping insertion in model container [2022-12-13 20:36:04,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:36:04" (3/3) ... [2022-12-13 20:36:04,392 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2022-12-13 20:36:04,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:36:04,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:36:04,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:36:04,448 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;@4db27887, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:36:04,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 20:36:04,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 20:36:04,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 20:36:04,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:04,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:04,457 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2022-12-13 20:36:04,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:04,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508911151] [2022-12-13 20:36:04,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:36:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508911151] [2022-12-13 20:36:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508911151] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:36:04,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:36:04,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:36:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435797687] [2022-12-13 20:36:04,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:36:04,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:36:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:04,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:36:04,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:36:04,705 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 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 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:36:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:04,756 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-12-13 20:36:04,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:36:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-12-13 20:36:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:04,764 INFO L225 Difference]: With dead ends: 25 [2022-12-13 20:36:04,764 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 20:36:04,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:36:04,769 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:04,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 20:36:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 20:36:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 20:36:04,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-13 20:36:04,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2022-12-13 20:36:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:04,797 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-13 20:36:04,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 20:36:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-13 20:36:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-13 20:36:04,799 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:04,799 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:04,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:36:04,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2022-12-13 20:36:04,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144211708] [2022-12-13 20:36:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:04,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:36:04,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:04,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144211708] [2022-12-13 20:36:04,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144211708] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439568402] [2022-12-13 20:36:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:04,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:04,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:36:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:04,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:36:05,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:36:05,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:36:05,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439568402] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:05,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:05,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2022-12-13 20:36:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134836612] [2022-12-13 20:36:05,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:05,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 20:36:05,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:05,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 20:36:05,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:36:05,204 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 20:36:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:05,242 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-13 20:36:05,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:36:05,242 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2022-12-13 20:36:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:05,243 INFO L225 Difference]: With dead ends: 22 [2022-12-13 20:36:05,243 INFO L226 Difference]: Without dead ends: 18 [2022-12-13 20:36:05,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:36:05,244 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:05,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-12-13 20:36:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-12-13 20:36:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:36:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-12-13 20:36:05,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-12-13 20:36:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:05,248 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-12-13 20:36:05,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-13 20:36:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-12-13 20:36:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 20:36:05,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:05,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:05,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:36:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:05,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2022-12-13 20:36:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:05,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232455811] [2022-12-13 20:36:05,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:05,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:05,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:05,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:05,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:36:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232455811] [2022-12-13 20:36:05,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232455811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166474754] [2022-12-13 20:36:05,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:36:05,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:05,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:05,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:05,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:36:05,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:36:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:05,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:36:05,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:36:05,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:36:05,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166474754] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:05,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:05,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2022-12-13 20:36:05,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055093871] [2022-12-13 20:36:05,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 20:36:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:05,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 20:36:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:36:05,971 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 20:36:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:06,022 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-12-13 20:36:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:36:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2022-12-13 20:36:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:06,024 INFO L225 Difference]: With dead ends: 25 [2022-12-13 20:36:06,024 INFO L226 Difference]: Without dead ends: 21 [2022-12-13 20:36:06,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:36:06,025 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:06,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 35 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-13 20:36:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-13 20:36:06,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-13 20:36:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-12-13 20:36:06,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2022-12-13 20:36:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:06,029 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-12-13 20:36:06,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-13 20:36:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-12-13 20:36:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 20:36:06,031 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:06,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:06,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:36:06,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 20:36:06,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:06,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2022-12-13 20:36:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183798268] [2022-12-13 20:36:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:06,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:06,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:06,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:06,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:06,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:36:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183798268] [2022-12-13 20:36:06,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183798268] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:06,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048692279] [2022-12-13 20:36:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:36:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:06,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:06,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:06,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:36:06,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 20:36:06,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:06,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:36:06,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:36:06,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:36:06,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048692279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:06,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:06,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2022-12-13 20:36:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111431707] [2022-12-13 20:36:06,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:36:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:36:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:36:06,940 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-13 20:36:06,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:06,983 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-12-13 20:36:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:36:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2022-12-13 20:36:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:06,984 INFO L225 Difference]: With dead ends: 28 [2022-12-13 20:36:06,984 INFO L226 Difference]: Without dead ends: 24 [2022-12-13 20:36:06,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:36:06,985 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:06,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 41 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-13 20:36:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-12-13 20:36:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-13 20:36:06,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-12-13 20:36:06,988 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2022-12-13 20:36:06,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:06,988 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-12-13 20:36:06,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2022-12-13 20:36:06,988 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-12-13 20:36:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 20:36:06,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:06,989 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:06,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:36:07,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:07,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2022-12-13 20:36:07,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:07,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113041942] [2022-12-13 20:36:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 20:36:07,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113041942] [2022-12-13 20:36:07,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113041942] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:07,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814125121] [2022-12-13 20:36:07,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:36:07,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:07,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:07,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:07,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:36:07,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:36:07,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:36:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 20:36:07,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:36:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814125121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2022-12-13 20:36:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642166791] [2022-12-13 20:36:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:36:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:36:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:36:08,092 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-12-13 20:36:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:08,138 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-12-13 20:36:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:36:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2022-12-13 20:36:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:08,139 INFO L225 Difference]: With dead ends: 31 [2022-12-13 20:36:08,139 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 20:36:08,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:36:08,140 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:08,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 20:36:08,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-13 20:36:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-13 20:36:08,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-13 20:36:08,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2022-12-13 20:36:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:08,144 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-13 20:36:08,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2022-12-13 20:36:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-13 20:36:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 20:36:08,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:08,146 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:08,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:36:08,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:08,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2022-12-13 20:36:08,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:08,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075071016] [2022-12-13 20:36:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 20:36:08,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075071016] [2022-12-13 20:36:08,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075071016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:08,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304945642] [2022-12-13 20:36:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:36:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:08,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:08,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:36:08,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 20:36:08,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:36:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-13 20:36:08,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:36:09,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304945642] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:09,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:09,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2022-12-13 20:36:09,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675810324] [2022-12-13 20:36:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:36:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:36:09,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:36:09,492 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-13 20:36:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:09,553 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-12-13 20:36:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:36:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2022-12-13 20:36:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:09,554 INFO L225 Difference]: With dead ends: 34 [2022-12-13 20:36:09,554 INFO L226 Difference]: Without dead ends: 30 [2022-12-13 20:36:09,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:36:09,556 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:09,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 57 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-13 20:36:09,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-13 20:36:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-13 20:36:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-12-13 20:36:09,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2022-12-13 20:36:09,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:09,561 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-12-13 20:36:09,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2022-12-13 20:36:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-12-13 20:36:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 20:36:09,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:09,562 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:09,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:36:09,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:09,764 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:09,765 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2022-12-13 20:36:09,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:09,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292730307] [2022-12-13 20:36:09,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:09,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:09,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:09,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:09,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:09,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:10,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 20:36:10,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292730307] [2022-12-13 20:36:10,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292730307] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:10,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334246202] [2022-12-13 20:36:10,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:36:10,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:10,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:10,036 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:10,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:36:10,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 20:36:10,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:36:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 20:36:10,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 20:36:11,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334246202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:11,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:11,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2022-12-13 20:36:11,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402375974] [2022-12-13 20:36:11,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:36:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:11,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:36:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:36:11,188 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-12-13 20:36:11,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:11,265 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-12-13 20:36:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:36:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2022-12-13 20:36:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:11,266 INFO L225 Difference]: With dead ends: 37 [2022-12-13 20:36:11,266 INFO L226 Difference]: Without dead ends: 33 [2022-12-13 20:36:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:36:11,267 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:11,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 67 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-13 20:36:11,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-12-13 20:36:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2022-12-13 20:36:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-12-13 20:36:11,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2022-12-13 20:36:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:11,271 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-12-13 20:36:11,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2022-12-13 20:36:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-12-13 20:36:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 20:36:11,271 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:11,272 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:11,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:36:11,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:11,473 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2022-12-13 20:36:11,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:11,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26594705] [2022-12-13 20:36:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:11,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,796 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 20:36:11,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:11,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26594705] [2022-12-13 20:36:11,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26594705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:11,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40796638] [2022-12-13 20:36:11,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:36:11,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:11,798 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:11,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:36:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 20:36:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:11,928 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-13 20:36:11,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:36:13,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40796638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:13,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:13,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2022-12-13 20:36:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715909628] [2022-12-13 20:36:13,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 20:36:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 20:36:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-12-13 20:36:13,151 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 20:36:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:13,213 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-12-13 20:36:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:36:13,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2022-12-13 20:36:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:13,214 INFO L225 Difference]: With dead ends: 40 [2022-12-13 20:36:13,215 INFO L226 Difference]: Without dead ends: 36 [2022-12-13 20:36:13,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2022-12-13 20:36:13,216 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:13,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 61 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-13 20:36:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-13 20:36:13,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-13 20:36:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-13 20:36:13,221 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2022-12-13 20:36:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:13,222 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-13 20:36:13,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2022-12-13 20:36:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-13 20:36:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:36:13,223 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:13,223 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:13,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:36:13,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:13,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:13,426 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2022-12-13 20:36:13,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:13,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077103659] [2022-12-13 20:36:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:13,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 20:36:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:13,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077103659] [2022-12-13 20:36:13,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077103659] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:13,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628485985] [2022-12-13 20:36:13,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:36:13,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:13,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:13,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:13,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:36:13,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:36:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:13,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:36:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-13 20:36:13,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:36:15,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628485985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:15,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:15,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2022-12-13 20:36:15,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847751794] [2022-12-13 20:36:15,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:15,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:36:15,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:15,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:36:15,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:36:15,629 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-13 20:36:15,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:15,702 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2022-12-13 20:36:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:36:15,703 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2022-12-13 20:36:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:15,704 INFO L225 Difference]: With dead ends: 43 [2022-12-13 20:36:15,704 INFO L226 Difference]: Without dead ends: 39 [2022-12-13 20:36:15,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:36:15,706 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:15,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 79 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-13 20:36:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-13 20:36:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2022-12-13 20:36:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-13 20:36:15,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2022-12-13 20:36:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:15,710 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-13 20:36:15,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2022-12-13 20:36:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-13 20:36:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 20:36:15,710 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:15,711 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:15,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:36:15,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:15,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:15,913 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2022-12-13 20:36:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552893822] [2022-12-13 20:36:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:15,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-13 20:36:16,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552893822] [2022-12-13 20:36:16,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552893822] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:16,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671920650] [2022-12-13 20:36:16,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:36:16,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:16,366 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:16,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:36:16,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 20:36:16,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:16,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 20:36:16,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-13 20:36:16,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:36:18,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671920650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:18,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:18,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2022-12-13 20:36:18,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667973094] [2022-12-13 20:36:18,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 20:36:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:18,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 20:36:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2022-12-13 20:36:18,624 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-12-13 20:36:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:18,710 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-12-13 20:36:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:36:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 64 [2022-12-13 20:36:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:18,711 INFO L225 Difference]: With dead ends: 46 [2022-12-13 20:36:18,711 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 20:36:18,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=849, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 20:36:18,712 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:18,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 89 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 20:36:18,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-12-13 20:36:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-13 20:36:18,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-12-13 20:36:18,716 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2022-12-13 20:36:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:18,716 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-12-13 20:36:18,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2022-12-13 20:36:18,716 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-12-13 20:36:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-13 20:36:18,717 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:18,717 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:18,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 20:36:18,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 20:36:18,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2022-12-13 20:36:18,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:18,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925023912] [2022-12-13 20:36:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-13 20:36:19,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925023912] [2022-12-13 20:36:19,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925023912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:19,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232469495] [2022-12-13 20:36:19,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:36:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:19,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:19,414 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:19,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:36:19,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:36:19,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:36:19,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-13 20:36:19,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 20:36:22,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232469495] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:22,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:22,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2022-12-13 20:36:22,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153593109] [2022-12-13 20:36:22,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:22,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 20:36:22,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 20:36:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2022-12-13 20:36:22,490 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-12-13 20:36:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:22,588 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-12-13 20:36:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:36:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 70 [2022-12-13 20:36:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:22,590 INFO L225 Difference]: With dead ends: 49 [2022-12-13 20:36:22,590 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 20:36:22,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 137 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=484, Invalid=998, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 20:36:22,591 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:22,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:22,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 20:36:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-13 20:36:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2022-12-13 20:36:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-12-13 20:36:22,596 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2022-12-13 20:36:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:22,597 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-12-13 20:36:22,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2022-12-13 20:36:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-12-13 20:36:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-13 20:36:22,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:22,598 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:22,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:36:22,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 20:36:22,800 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:22,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2022-12-13 20:36:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:22,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304277416] [2022-12-13 20:36:22,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:22,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:22,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:22,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:23,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:23,380 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-13 20:36:23,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304277416] [2022-12-13 20:36:23,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304277416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:23,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684460498] [2022-12-13 20:36:23,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:36:23,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:23,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:23,381 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:23,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:36:23,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 20:36:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:36:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-12-13 20:36:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:36:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684460498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:27,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:27,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2022-12-13 20:36:27,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385451024] [2022-12-13 20:36:27,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 20:36:27,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 20:36:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2022-12-13 20:36:27,808 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-12-13 20:36:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:27,931 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-12-13 20:36:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:36:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 76 [2022-12-13 20:36:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:27,932 INFO L225 Difference]: With dead ends: 52 [2022-12-13 20:36:27,932 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 20:36:27,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 149 SyntacticMatches, 12 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=1159, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:36:27,934 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:27,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 89 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 20:36:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-13 20:36:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-13 20:36:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-12-13 20:36:27,938 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2022-12-13 20:36:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:27,938 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-12-13 20:36:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2022-12-13 20:36:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-12-13 20:36:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-12-13 20:36:27,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:27,939 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:27,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 20:36:28,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 20:36:28,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:28,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2022-12-13 20:36:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208444443] [2022-12-13 20:36:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:28,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-13 20:36:28,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208444443] [2022-12-13 20:36:28,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208444443] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:28,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101247707] [2022-12-13 20:36:28,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:36:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:28,793 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:36:29,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 20:36:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:29,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 20:36:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-12-13 20:36:29,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-13 20:36:33,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101247707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:33,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:33,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2022-12-13 20:36:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812099933] [2022-12-13 20:36:33,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:33,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:36:33,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:36:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:36:33,850 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-12-13 20:36:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:33,959 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-12-13 20:36:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:36:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 82 [2022-12-13 20:36:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:33,960 INFO L225 Difference]: With dead ends: 55 [2022-12-13 20:36:33,960 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 20:36:33,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 161 SyntacticMatches, 13 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=648, Invalid=1332, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 20:36:33,961 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:33,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 91 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:36:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 20:36:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-12-13 20:36:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2022-12-13 20:36:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-12-13 20:36:33,964 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2022-12-13 20:36:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:33,964 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-12-13 20:36:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2022-12-13 20:36:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-12-13 20:36:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 20:36:33,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:33,965 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:33,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:36:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:34,166 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:34,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2022-12-13 20:36:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:34,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712256541] [2022-12-13 20:36:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:34,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-13 20:36:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712256541] [2022-12-13 20:36:34,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712256541] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354732079] [2022-12-13 20:36:34,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:36:34,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:34,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:34,924 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:34,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:36:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:35,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 20:36:35,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-12-13 20:36:35,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:36:41,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354732079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:41,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:41,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2022-12-13 20:36:41,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887592749] [2022-12-13 20:36:41,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:41,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 20:36:41,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 20:36:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:36:41,777 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-12-13 20:36:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:41,919 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2022-12-13 20:36:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:36:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 88 [2022-12-13 20:36:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:41,920 INFO L225 Difference]: With dead ends: 58 [2022-12-13 20:36:41,920 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 20:36:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 173 SyntacticMatches, 14 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=739, Invalid=1517, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 20:36:41,922 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 207 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 105 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:36:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 20:36:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-13 20:36:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-13 20:36:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-12-13 20:36:41,926 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2022-12-13 20:36:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:41,926 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-12-13 20:36:41,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2022-12-13 20:36:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-12-13 20:36:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 20:36:41,927 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:41,927 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:41,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 20:36:42,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:42,128 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2022-12-13 20:36:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:42,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506188882] [2022-12-13 20:36:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:42,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-13 20:36:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:42,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506188882] [2022-12-13 20:36:42,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506188882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910865647] [2022-12-13 20:36:42,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:36:42,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:42,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:42,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:36:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:36:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:43,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 20:36:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-12-13 20:36:43,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:36:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-13 20:36:51,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910865647] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:36:51,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:36:51,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2022-12-13 20:36:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904297953] [2022-12-13 20:36:51,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:36:51,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 20:36:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:36:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 20:36:51,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 20:36:51,615 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-12-13 20:36:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:36:51,765 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-12-13 20:36:51,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 20:36:51,765 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 94 [2022-12-13 20:36:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:36:51,766 INFO L225 Difference]: With dead ends: 61 [2022-12-13 20:36:51,766 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 20:36:51,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 185 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=836, Invalid=1714, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 20:36:51,767 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:36:51,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 115 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:36:51,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 20:36:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-13 20:36:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2022-12-13 20:36:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-12-13 20:36:51,770 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2022-12-13 20:36:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:36:51,770 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-12-13 20:36:51,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2022-12-13 20:36:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-12-13 20:36:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-12-13 20:36:51,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:36:51,771 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:36:51,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 20:36:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 20:36:51,971 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:36:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:36:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2022-12-13 20:36:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:36:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151984594] [2022-12-13 20:36:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:36:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:36:51,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:36:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:36:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-13 20:36:52,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:36:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151984594] [2022-12-13 20:36:52,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151984594] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:36:52,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359774456] [2022-12-13 20:36:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:36:52,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:36:52,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:36:52,804 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:36:52,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:36:53,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-13 20:36:53,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:36:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 20:36:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:36:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-12-13 20:36:53,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:37:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:37:01,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359774456] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:37:01,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:37:01,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2022-12-13 20:37:01,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564219544] [2022-12-13 20:37:01,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:37:01,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 20:37:01,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 20:37:01,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:37:01,832 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-12-13 20:37:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:02,011 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2022-12-13 20:37:02,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:37:02,011 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 100 [2022-12-13 20:37:02,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:02,012 INFO L225 Difference]: With dead ends: 64 [2022-12-13 20:37:02,012 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 20:37:02,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 197 SyntacticMatches, 16 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=939, Invalid=1923, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 20:37:02,014 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 139 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:02,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 125 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:37:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 20:37:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-13 20:37:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-13 20:37:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-12-13 20:37:02,018 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2022-12-13 20:37:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:02,019 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-12-13 20:37:02,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2022-12-13 20:37:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-12-13 20:37:02,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-12-13 20:37:02,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:02,020 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:02,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-13 20:37:02,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:37:02,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:02,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:02,222 INFO L85 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2022-12-13 20:37:02,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:02,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32609010] [2022-12-13 20:37:02,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:02,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:02,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-12-13 20:37:03,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32609010] [2022-12-13 20:37:03,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32609010] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:37:03,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799826390] [2022-12-13 20:37:03,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:37:03,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:37:03,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:37:03,344 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:37:03,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:37:03,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:37:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:37:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 20:37:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:37:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-12-13 20:37:03,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:37:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-13 20:37:15,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799826390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:37:15,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:37:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2022-12-13 20:37:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319154953] [2022-12-13 20:37:15,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:37:15,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 20:37:15,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 20:37:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 20:37:15,203 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-12-13 20:37:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:15,362 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2022-12-13 20:37:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:37:15,362 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 106 [2022-12-13 20:37:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:15,363 INFO L225 Difference]: With dead ends: 67 [2022-12-13 20:37:15,363 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 20:37:15,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 209 SyntacticMatches, 17 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1048, Invalid=2144, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:37:15,365 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 260 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:15,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 123 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:37:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 20:37:15,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-13 20:37:15,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2022-12-13 20:37:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-12-13 20:37:15,369 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2022-12-13 20:37:15,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:15,370 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-12-13 20:37:15,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 20 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2022-12-13 20:37:15,370 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-12-13 20:37:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-13 20:37:15,371 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:15,371 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:15,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:37:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 20:37:15,572 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:15,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2022-12-13 20:37:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:15,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323697411] [2022-12-13 20:37:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:15,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:15,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:15,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-13 20:37:16,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323697411] [2022-12-13 20:37:16,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323697411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:37:16,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238301053] [2022-12-13 20:37:16,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:37:16,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:37:16,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:37:16,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:37:16,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:37:17,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-12-13 20:37:17,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:37:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 20:37:17,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:37:17,364 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-12-13 20:37:17,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:37:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:37:30,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238301053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:37:30,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:37:30,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2022-12-13 20:37:30,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955141443] [2022-12-13 20:37:30,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:37:30,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 20:37:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:37:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 20:37:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:37:30,522 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-12-13 20:37:30,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:37:30,705 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-12-13 20:37:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 20:37:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 112 [2022-12-13 20:37:30,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:37:30,706 INFO L225 Difference]: With dead ends: 70 [2022-12-13 20:37:30,706 INFO L226 Difference]: Without dead ends: 66 [2022-12-13 20:37:30,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 221 SyntacticMatches, 18 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1163, Invalid=2377, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 20:37:30,708 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:37:30,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 137 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:37:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-13 20:37:30,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-12-13 20:37:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-13 20:37:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-12-13 20:37:30,712 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2022-12-13 20:37:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:37:30,713 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-12-13 20:37:30,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2022-12-13 20:37:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-12-13 20:37:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-13 20:37:30,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:37:30,713 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:37:30,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 20:37:30,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 20:37:30,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:37:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:37:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2022-12-13 20:37:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:37:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460381121] [2022-12-13 20:37:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:37:30,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:37:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:31,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:32,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:32,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:32,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:32,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:37:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:37:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-12-13 20:37:32,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:37:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460381121] [2022-12-13 20:37:32,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460381121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:37:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724428053] [2022-12-13 20:37:32,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:37:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:37:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:37:32,087 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:37:32,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 20:37:32,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-12-13 20:37:32,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:37:32,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-13 20:37:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:37:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-12-13 20:37:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:38:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-12-13 20:38:20,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724428053] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:38:20,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:38:20,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 43, 43] total 66 [2022-12-13 20:38:20,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095292590] [2022-12-13 20:38:20,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:38:20,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-12-13 20:38:20,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:20,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-12-13 20:38:20,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=3659, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 20:38:20,029 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 66 states, 64 states have (on average 1.40625) internal successors, (90), 46 states have internal predecessors, (90), 4 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (39), 39 states have call predecessors, (39), 4 states have call successors, (39) [2022-12-13 20:38:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:20,801 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-12-13 20:38:20,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 20:38:20,801 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.40625) internal successors, (90), 46 states have internal predecessors, (90), 4 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (39), 39 states have call predecessors, (39), 4 states have call successors, (39) Word has length 118 [2022-12-13 20:38:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:20,802 INFO L225 Difference]: With dead ends: 73 [2022-12-13 20:38:20,802 INFO L226 Difference]: Without dead ends: 69 [2022-12-13 20:38:20,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 174 SyntacticMatches, 56 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1866, Invalid=8846, Unknown=0, NotChecked=0, Total=10712 [2022-12-13 20:38:20,804 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:20,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 109 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:38:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-13 20:38:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-12-13 20:38:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-13 20:38:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-12-13 20:38:20,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2022-12-13 20:38:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:20,807 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-12-13 20:38:20,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.40625) internal successors, (90), 46 states have internal predecessors, (90), 4 states have call successors, (4), 1 states have call predecessors, (4), 38 states have return successors, (39), 39 states have call predecessors, (39), 4 states have call successors, (39) [2022-12-13 20:38:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-12-13 20:38:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 20:38:20,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:20,808 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:20,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 20:38:21,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:38:21,009 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:21,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2022-12-13 20:38:21,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113828296] [2022-12-13 20:38:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:22,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-13 20:38:22,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:22,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113828296] [2022-12-13 20:38:22,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113828296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:38:22,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325171591] [2022-12-13 20:38:22,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:38:22,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:38:22,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:38:22,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:38:22,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 20:38:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:23,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 20:38:23,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:38:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-12-13 20:38:23,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:38:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:38:41,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325171591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:38:41,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:38:41,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2022-12-13 20:38:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927323564] [2022-12-13 20:38:41,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:38:41,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-13 20:38:41,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:38:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-13 20:38:41,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=1539, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 20:38:41,436 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2022-12-13 20:38:41,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:38:41,638 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2022-12-13 20:38:41,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:38:41,638 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) Word has length 124 [2022-12-13 20:38:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:38:41,639 INFO L225 Difference]: With dead ends: 76 [2022-12-13 20:38:41,639 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 20:38:41,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 245 SyntacticMatches, 20 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1411, Invalid=2879, Unknown=0, NotChecked=0, Total=4290 [2022-12-13 20:38:41,642 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 209 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:38:41,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 149 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:38:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 20:38:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 20:38:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2022-12-13 20:38:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-12-13 20:38:41,645 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2022-12-13 20:38:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:38:41,645 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-12-13 20:38:41,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (59), 20 states have call predecessors, (59), 23 states have call successors, (59) [2022-12-13 20:38:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-12-13 20:38:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-13 20:38:41,646 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:38:41,646 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:38:41,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 20:38:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:38:41,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:38:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:38:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2022-12-13 20:38:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:38:41,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371974448] [2022-12-13 20:38:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:38:41,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:38:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:42,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:38:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:38:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-12-13 20:38:43,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:38:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371974448] [2022-12-13 20:38:43,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371974448] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:38:43,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628180484] [2022-12-13 20:38:43,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:38:43,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:38:43,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:38:43,521 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:38:43,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 20:38:45,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:38:45,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:38:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 20:38:45,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:38:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-12-13 20:38:45,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:39:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-12-13 20:39:07,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628180484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:39:07,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:39:07,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 48 [2022-12-13 20:39:07,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125733574] [2022-12-13 20:39:07,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:39:07,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 20:39:07,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:39:07,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 20:39:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 20:39:07,706 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2022-12-13 20:39:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:39:07,944 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2022-12-13 20:39:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:39:07,944 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) Word has length 130 [2022-12-13 20:39:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:39:07,945 INFO L225 Difference]: With dead ends: 79 [2022-12-13 20:39:07,945 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 20:39:07,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 257 SyntacticMatches, 21 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1544, Invalid=3148, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 20:39:07,946 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 412 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:39:07,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 139 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:39:07,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 20:39:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-13 20:39:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-13 20:39:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-13 20:39:07,949 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2022-12-13 20:39:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:39:07,949 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-13 20:39:07,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (62), 21 states have call predecessors, (62), 24 states have call successors, (62) [2022-12-13 20:39:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-13 20:39:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-13 20:39:07,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:39:07,950 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:07,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 20:39:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 20:39:08,151 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:39:08,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:08,151 INFO L85 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2022-12-13 20:39:08,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:39:08,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067516176] [2022-12-13 20:39:08,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:39:08,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:39:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:08,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:08,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:08,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:09,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-12-13 20:39:10,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:39:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067516176] [2022-12-13 20:39:10,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067516176] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:39:10,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474592022] [2022-12-13 20:39:10,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:39:10,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:39:10,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:39:10,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:39:10,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 20:39:11,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-12-13 20:39:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:39:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 20:39:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:39:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-12-13 20:39:11,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:39:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:39:37,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474592022] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:39:37,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:39:37,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 47] total 50 [2022-12-13 20:39:37,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199820603] [2022-12-13 20:39:37,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:39:37,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 20:39:37,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:39:37,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 20:39:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=1823, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 20:39:37,109 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2022-12-13 20:39:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:39:37,358 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2022-12-13 20:39:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 20:39:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) Word has length 136 [2022-12-13 20:39:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:39:37,359 INFO L225 Difference]: With dead ends: 82 [2022-12-13 20:39:37,359 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 20:39:37,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 269 SyntacticMatches, 22 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=3429, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 20:39:37,360 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 344 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:39:37,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 153 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:39:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 20:39:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-13 20:39:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (24), 23 states have call predecessors, (24), 2 states have call successors, (24) [2022-12-13 20:39:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-12-13 20:39:37,362 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2022-12-13 20:39:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:39:37,363 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-12-13 20:39:37,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0625) internal successors, (99), 50 states have internal predecessors, (99), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (65), 22 states have call predecessors, (65), 25 states have call successors, (65) [2022-12-13 20:39:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-12-13 20:39:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-13 20:39:37,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:39:37,363 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:39:37,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-13 20:39:37,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:39:37,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:39:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:39:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2022-12-13 20:39:37,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:39:37,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098341719] [2022-12-13 20:39:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:39:37,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:39:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:37,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:37,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:38,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:39:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:39:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-12-13 20:39:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:39:39,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098341719] [2022-12-13 20:39:39,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098341719] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:39:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896168706] [2022-12-13 20:39:39,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:39:39,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:39:39,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:39:39,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:39:39,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 20:39:41,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:39:41,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:39:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 20:39:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:39:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2022-12-13 20:39:41,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:40:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-13 20:40:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896168706] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:40:11,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:40:11,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 49] total 52 [2022-12-13 20:40:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092560070] [2022-12-13 20:40:11,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:40:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-13 20:40:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-13 20:40:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=1974, Unknown=0, NotChecked=0, Total=2652 [2022-12-13 20:40:11,715 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 52 states, 50 states have (on average 2.06) internal successors, (103), 52 states have internal predecessors, (103), 26 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2022-12-13 20:40:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:11,989 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-12-13 20:40:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 20:40:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.06) internal successors, (103), 52 states have internal predecessors, (103), 26 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) Word has length 142 [2022-12-13 20:40:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:11,990 INFO L225 Difference]: With dead ends: 85 [2022-12-13 20:40:11,990 INFO L226 Difference]: Without dead ends: 81 [2022-12-13 20:40:11,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 281 SyntacticMatches, 23 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1828, Invalid=3722, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 20:40:11,992 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 171 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:11,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 159 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:40:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-13 20:40:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-12-13 20:40:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2022-12-13 20:40:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-12-13 20:40:11,996 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2022-12-13 20:40:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:11,996 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-12-13 20:40:11,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.06) internal successors, (103), 52 states have internal predecessors, (103), 26 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (68), 23 states have call predecessors, (68), 26 states have call successors, (68) [2022-12-13 20:40:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-12-13 20:40:11,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-13 20:40:11,998 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:11,998 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:12,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 20:40:12,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:40:12,198 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2022-12-13 20:40:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:12,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836934641] [2022-12-13 20:40:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:12,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:12,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:12,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-12-13 20:40:14,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836934641] [2022-12-13 20:40:14,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836934641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:40:14,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029029677] [2022-12-13 20:40:14,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:40:14,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:40:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:40:14,471 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:40:14,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 20:40:17,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 20:40:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:40:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 20:40:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:40:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-12-13 20:40:17,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:40:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:40:53,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029029677] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:40:53,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:40:53,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 51] total 54 [2022-12-13 20:40:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637882232] [2022-12-13 20:40:53,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:40:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 20:40:53,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:40:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 20:40:53,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=2131, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 20:40:53,079 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 54 states have internal predecessors, (107), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2022-12-13 20:40:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:40:53,370 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2022-12-13 20:40:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 20:40:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 54 states have internal predecessors, (107), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) Word has length 148 [2022-12-13 20:40:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:40:53,371 INFO L225 Difference]: With dead ends: 88 [2022-12-13 20:40:53,371 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 20:40:53,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 293 SyntacticMatches, 24 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1979, Invalid=4027, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:40:53,372 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 134 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:40:53,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 161 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:40:53,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 20:40:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-13 20:40:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 57 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2022-12-13 20:40:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-12-13 20:40:53,375 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2022-12-13 20:40:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:40:53,375 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-12-13 20:40:53,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 54 states have internal predecessors, (107), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (71), 24 states have call predecessors, (71), 27 states have call successors, (71) [2022-12-13 20:40:53,376 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-12-13 20:40:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-13 20:40:53,376 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:40:53,376 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:40:53,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 20:40:53,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-13 20:40:53,577 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:40:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:40:53,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2022-12-13 20:40:53,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:40:53,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733322475] [2022-12-13 20:40:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:40:53,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:40:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:53,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:54,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:56,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:40:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:40:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-12-13 20:40:56,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:40:56,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733322475] [2022-12-13 20:40:56,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733322475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:40:56,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075026479] [2022-12-13 20:40:56,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:40:56,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:40:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:40:56,036 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:40:56,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 20:40:58,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-12-13 20:40:58,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:40:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 20:40:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:40:58,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2022-12-13 20:40:58,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:41:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-12-13 20:41:37,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075026479] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:41:37,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:41:37,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 53] total 55 [2022-12-13 20:41:37,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124637588] [2022-12-13 20:41:37,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:41:37,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 20:41:37,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:41:37,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 20:41:37,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 20:41:37,195 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 55 states have internal predecessors, (110), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2022-12-13 20:41:37,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:41:37,508 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-12-13 20:41:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:41:37,508 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 55 states have internal predecessors, (110), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) Word has length 154 [2022-12-13 20:41:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:41:37,509 INFO L225 Difference]: With dead ends: 91 [2022-12-13 20:41:37,509 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 20:41:37,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 305 SyntacticMatches, 26 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2725 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2133, Invalid=4187, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 20:41:37,511 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 233 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:41:37,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 167 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:41:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 20:41:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-13 20:41:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 26 states have return successors, (27), 26 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-13 20:41:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-12-13 20:41:37,515 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2022-12-13 20:41:37,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:41:37,515 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-12-13 20:41:37,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 55 states have internal predecessors, (110), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (73), 25 states have call predecessors, (73), 27 states have call successors, (73) [2022-12-13 20:41:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-12-13 20:41:37,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-12-13 20:41:37,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:41:37,516 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:41:37,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 20:41:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 20:41:37,717 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:41:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:41:37,721 INFO L85 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2022-12-13 20:41:37,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:41:37,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036933375] [2022-12-13 20:41:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:41:37,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:41:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:37,841 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 20:41:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 20:41:37,935 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 20:41:37,935 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 20:41:37,936 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 20:41:37,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 20:41:37,940 INFO L445 BasicCegarLoop]: Path program histogram: [25, 1] [2022-12-13 20:41:37,943 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 20:41:37,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 08:41:37 BoogieIcfgContainer [2022-12-13 20:41:37,975 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 20:41:37,975 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 20:41:37,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 20:41:37,975 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 20:41:37,976 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:36:04" (3/4) ... [2022-12-13 20:41:37,977 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-13 20:41:38,010 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 20:41:38,010 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 20:41:38,011 INFO L158 Benchmark]: Toolchain (without parser) took 333977.34ms. Allocated memory was 142.6MB in the beginning and 627.0MB in the end (delta: 484.4MB). Free memory was 108.9MB in the beginning and 217.3MB in the end (delta: -108.4MB). Peak memory consumption was 374.5MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,011 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory is still 110.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:41:38,011 INFO L158 Benchmark]: CACSL2BoogieTranslator took 150.93ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 98.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,011 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.45ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 97.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 20:41:38,011 INFO L158 Benchmark]: Boogie Preprocessor took 11.59ms. Allocated memory is still 142.6MB. Free memory was 97.1MB in the beginning and 96.5MB in the end (delta: 694.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,011 INFO L158 Benchmark]: RCFGBuilder took 166.37ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 87.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,012 INFO L158 Benchmark]: TraceAbstraction took 333587.31ms. Allocated memory was 142.6MB in the beginning and 627.0MB in the end (delta: 484.4MB). Free memory was 86.6MB in the beginning and 222.6MB in the end (delta: -135.9MB). Peak memory consumption was 349.4MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,012 INFO L158 Benchmark]: Witness Printer took 35.17ms. Allocated memory is still 627.0MB. Free memory was 221.5MB in the beginning and 217.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-13 20:41:38,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 142.6MB. Free memory is still 110.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 150.93ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 98.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.45ms. Allocated memory is still 142.6MB. Free memory was 98.6MB in the beginning and 97.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 11.59ms. Allocated memory is still 142.6MB. Free memory was 97.1MB in the beginning and 96.5MB in the end (delta: 694.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 166.37ms. Allocated memory is still 142.6MB. Free memory was 96.5MB in the beginning and 87.1MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 333587.31ms. Allocated memory was 142.6MB in the beginning and 627.0MB in the end (delta: 484.4MB). Free memory was 86.6MB in the beginning and 222.6MB in the end (delta: -135.9MB). Peak memory consumption was 349.4MB. Max. memory is 16.1GB. * Witness Printer took 35.17ms. Allocated memory is still 627.0MB. Free memory was 221.5MB in the beginning and 217.3MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 25; [L15] int b = 0; VAL [a=25, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L6] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L6] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L6] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L6] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L6] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=25, b=0, sum(a, b)=25] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b VAL [a=25, b=0, result=25] [L18] reach_error() VAL [a=25, b=0, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 333.5s, OverallIterations: 26, TraceHistogramMax: 26, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 4.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3489 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3134 mSDsluCounter, 2443 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2217 mSDsCounter, 1294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2291 IncrementalHoareTripleChecker+Invalid, 3585 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1294 mSolverCounterUnsat, 226 mSDtfsCounter, 2291 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5426 GetRequests, 3952 SyntacticMatches, 362 SemanticMatches, 1112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27466 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=25, InterpolantAutomatonStates: 443, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 306.9s InterpolantComputationTime, 4250 NumberOfCodeBlocks, 4250 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 6057 ConstructedInterpolants, 0 QuantifiedInterpolants, 18253 SizeOfPredicates, 329 NumberOfNonLiveVariables, 6648 ConjunctsInSsa, 736 ConjunctsInUnsatCore, 73 InterpolantComputations, 1 PerfectInterpolantSequences, 17924/45000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-13 20:41:38,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96be618e-1785-4c2d-8eed-42b4a2a9177b/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE