./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/forester-heap/sll-sorted-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/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_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-sorted-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 --- 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 20:53:21,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:53:21,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:53:21,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:53:21,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:53:21,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:53:21,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:53:21,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:53:21,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:53:21,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:53:21,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:53:21,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:53:21,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:53:21,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:53:21,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:53:21,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:53:21,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:53:21,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:53:21,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:53:21,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:53:21,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:53:21,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:53:21,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:53:21,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:53:21,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:53:21,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:53:21,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:53:21,263 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:53:21,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:53:21,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:53:21,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:53:21,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:53:21,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:53:21,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:53:21,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:53:21,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:53:21,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:53:21,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:53:21,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:53:21,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:53:21,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:53:21,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2022-12-13 20:53:21,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:53:21,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:53:21,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:53:21,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:53:21,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:53:21,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:53:21,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:53:21,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:53:21,296 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:53:21,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:53:21,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:53:21,297 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:53:21,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:53:21,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:53:21,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:53:21,298 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:53:21,298 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:53:21,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:53:21,298 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:53:21,299 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:53:21,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:53:21,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:53:21,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:53:21,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:53:21,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:53:21,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:53:21,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:53:21,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:53:21,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:53:21,300 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:53:21,300 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:53:21,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:53:21,301 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:53:21,301 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e45b14428dafe2f20aeac8c38d2592befc15b6791b0365935474ded4fd47d0f2 [2022-12-13 20:53:21,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:53:21,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:53:21,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:53:21,524 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:53:21,524 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:53:21,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/forester-heap/sll-sorted-1.i [2022-12-13 20:53:24,029 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:53:24,246 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:53:24,246 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i [2022-12-13 20:53:24,253 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/data/715284a41/a8559049893e470f8150fe575fccc551/FLAG7e3132a3d [2022-12-13 20:53:24,626 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/data/715284a41/a8559049893e470f8150fe575fccc551 [2022-12-13 20:53:24,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:53:24,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:53:24,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:53:24,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:53:24,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:53:24,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:53:24" (1/1) ... [2022-12-13 20:53:24,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7db828fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:24, skipping insertion in model container [2022-12-13 20:53:24,654 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:53:24" (1/1) ... [2022-12-13 20:53:24,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:53:24,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:53:24,959 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2022-12-13 20:53:24,965 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2022-12-13 20:53:24,968 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2022-12-13 20:53:24,968 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2022-12-13 20:53:24,969 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2022-12-13 20:53:24,970 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2022-12-13 20:53:24,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:53:24,981 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:53:25,005 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22317,22330] [2022-12-13 20:53:25,006 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22547,22560] [2022-12-13 20:53:25,008 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22877,22890] [2022-12-13 20:53:25,009 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[22941,22954] [2022-12-13 20:53:25,010 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23072,23085] [2022-12-13 20:53:25,010 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_10f03271-48f2-4b43-a89f-743ee2a2c44d/sv-benchmarks/c/forester-heap/sll-sorted-1.i[23136,23149] [2022-12-13 20:53:25,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:53:25,028 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:53:25,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25 WrapperNode [2022-12-13 20:53:25,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:53:25,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:53:25,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:53:25,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:53:25,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,059 INFO L138 Inliner]: procedures = 119, calls = 39, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 189 [2022-12-13 20:53:25,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:53:25,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:53:25,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:53:25,060 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:53:25,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:53:25,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:53:25,082 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:53:25,082 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:53:25,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (1/1) ... [2022-12-13 20:53:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:53:25,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:25,103 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:53:25,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 20:53:25,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:53:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:53:25,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:53:25,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:53:25,215 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:53:25,217 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:53:25,568 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:53:25,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:53:25,576 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-12-13 20:53:25,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:53:25 BoogieIcfgContainer [2022-12-13 20:53:25,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:53:25,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:53:25,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:53:25,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:53:25,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:53:24" (1/3) ... [2022-12-13 20:53:25,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b34d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:53:25, skipping insertion in model container [2022-12-13 20:53:25,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:53:25" (2/3) ... [2022-12-13 20:53:25,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b34d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:53:25, skipping insertion in model container [2022-12-13 20:53:25,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:53:25" (3/3) ... [2022-12-13 20:53:25,589 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-sorted-1.i [2022-12-13 20:53:25,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:53:25,605 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2022-12-13 20:53:25,640 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:53:25,644 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7fd2cbf8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:53:25,645 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2022-12-13 20:53:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 90 states have (on average 2.1555555555555554) internal successors, (194), 158 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 20:53:25,655 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:25,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 20:53:25,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-12-13 20:53:25,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:25,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050640820] [2022-12-13 20:53:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:25,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:25,805 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 20:53:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:25,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050640820] [2022-12-13 20:53:25,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050640820] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:25,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:25,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:53:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295936239] [2022-12-13 20:53:25,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:25,850 INFO L87 Difference]: Start difference. First operand has 159 states, 90 states have (on average 2.1555555555555554) internal successors, (194), 158 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:25,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:25,974 INFO L93 Difference]: Finished difference Result 163 states and 174 transitions. [2022-12-13 20:53:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:25,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-13 20:53:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:25,982 INFO L225 Difference]: With dead ends: 163 [2022-12-13 20:53:25,982 INFO L226 Difference]: Without dead ends: 159 [2022-12-13 20:53:25,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:25,985 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:25,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 111 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:25,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-12-13 20:53:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2022-12-13 20:53:26,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 89 states have (on average 1.8651685393258426) internal successors, (166), 154 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 166 transitions. [2022-12-13 20:53:26,018 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 166 transitions. Word has length 3 [2022-12-13 20:53:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:26,018 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 166 transitions. [2022-12-13 20:53:26,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 166 transitions. [2022-12-13 20:53:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-13 20:53:26,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:26,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-13 20:53:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:53:26,020 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:26,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:26,021 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-12-13 20:53:26,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:26,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298366093] [2022-12-13 20:53:26,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:26,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:26,105 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 20:53:26,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:26,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298366093] [2022-12-13 20:53:26,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298366093] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:26,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:26,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:53:26,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757825792] [2022-12-13 20:53:26,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:26,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:26,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:26,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:26,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:26,108 INFO L87 Difference]: Start difference. First operand 155 states and 166 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:26,201 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-12-13 20:53:26,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:26,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-13 20:53:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:26,203 INFO L225 Difference]: With dead ends: 157 [2022-12-13 20:53:26,204 INFO L226 Difference]: Without dead ends: 157 [2022-12-13 20:53:26,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:26,205 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 149 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:26,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-12-13 20:53:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 153. [2022-12-13 20:53:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 89 states have (on average 1.8426966292134832) internal successors, (164), 152 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2022-12-13 20:53:26,218 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 3 [2022-12-13 20:53:26,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:26,218 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2022-12-13 20:53:26,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,218 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2022-12-13 20:53:26,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 20:53:26,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:26,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:26,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:53:26,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:26,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:26,220 INFO L85 PathProgramCache]: Analyzing trace with hash 59263661, now seen corresponding path program 1 times [2022-12-13 20:53:26,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:26,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223573660] [2022-12-13 20:53:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:26,369 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 20:53:26,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223573660] [2022-12-13 20:53:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223573660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:26,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:26,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:53:26,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114307799] [2022-12-13 20:53:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:26,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:53:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:53:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:53:26,372 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:26,519 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2022-12-13 20:53:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:53:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 20:53:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:26,521 INFO L225 Difference]: With dead ends: 162 [2022-12-13 20:53:26,521 INFO L226 Difference]: Without dead ends: 162 [2022-12-13 20:53:26,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:53:26,522 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 268 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:26,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 84 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-12-13 20:53:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 151. [2022-12-13 20:53:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 103 states have (on average 1.6796116504854368) internal successors, (173), 150 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2022-12-13 20:53:26,533 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 8 [2022-12-13 20:53:26,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:26,533 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2022-12-13 20:53:26,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2022-12-13 20:53:26,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 20:53:26,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:26,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:26,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:53:26,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:26,535 INFO L85 PathProgramCache]: Analyzing trace with hash 59263662, now seen corresponding path program 1 times [2022-12-13 20:53:26,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:26,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071257072] [2022-12-13 20:53:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:26,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:26,655 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 20:53:26,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:26,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071257072] [2022-12-13 20:53:26,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071257072] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:26,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:26,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:53:26,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792637715] [2022-12-13 20:53:26,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:26,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:53:26,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:53:26,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:53:26,658 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:26,841 INFO L93 Difference]: Finished difference Result 229 states and 253 transitions. [2022-12-13 20:53:26,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:53:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 20:53:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:26,843 INFO L225 Difference]: With dead ends: 229 [2022-12-13 20:53:26,843 INFO L226 Difference]: Without dead ends: 229 [2022-12-13 20:53:26,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:53:26,844 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 303 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:26,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 138 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:53:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-13 20:53:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 197. [2022-12-13 20:53:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 149 states have (on average 1.5771812080536913) internal successors, (235), 196 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 235 transitions. [2022-12-13 20:53:26,855 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 235 transitions. Word has length 8 [2022-12-13 20:53:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:26,855 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 235 transitions. [2022-12-13 20:53:26,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 235 transitions. [2022-12-13 20:53:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 20:53:26,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:26,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:26,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:53:26,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1117776432, now seen corresponding path program 1 times [2022-12-13 20:53:26,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:26,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979975962] [2022-12-13 20:53:26,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:26,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:26,886 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 20:53:26,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:26,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979975962] [2022-12-13 20:53:26,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979975962] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:26,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:26,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:53:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425024501] [2022-12-13 20:53:26,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:26,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:26,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:26,888 INFO L87 Difference]: Start difference. First operand 197 states and 235 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:26,906 INFO L93 Difference]: Finished difference Result 237 states and 278 transitions. [2022-12-13 20:53:26,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:26,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 20:53:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:26,909 INFO L225 Difference]: With dead ends: 237 [2022-12-13 20:53:26,909 INFO L226 Difference]: Without dead ends: 237 [2022-12-13 20:53:26,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:26,910 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 105 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:26,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 211 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:53:26,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-13 20:53:26,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 207. [2022-12-13 20:53:26,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 206 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2022-12-13 20:53:26,920 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 10 [2022-12-13 20:53:26,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:26,921 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2022-12-13 20:53:26,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2022-12-13 20:53:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 20:53:26,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:26,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:26,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:53:26,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 467003055, now seen corresponding path program 1 times [2022-12-13 20:53:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:26,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784211881] [2022-12-13 20:53:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:27,032 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 20:53:27,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:27,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784211881] [2022-12-13 20:53:27,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784211881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:27,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:27,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:53:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296547373] [2022-12-13 20:53:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:53:27,034 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:27,195 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2022-12-13 20:53:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:53:27,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 20:53:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:27,197 INFO L225 Difference]: With dead ends: 213 [2022-12-13 20:53:27,197 INFO L226 Difference]: Without dead ends: 213 [2022-12-13 20:53:27,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:53:27,198 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 100 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:27,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 356 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:27,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-13 20:53:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 206. [2022-12-13 20:53:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 159 states have (on average 1.5534591194968554) internal successors, (247), 205 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 247 transitions. [2022-12-13 20:53:27,204 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 247 transitions. Word has length 12 [2022-12-13 20:53:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:27,204 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 247 transitions. [2022-12-13 20:53:27,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 247 transitions. [2022-12-13 20:53:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 20:53:27,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:27,205 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:27,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:53:27,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:27,206 INFO L85 PathProgramCache]: Analyzing trace with hash 467003056, now seen corresponding path program 1 times [2022-12-13 20:53:27,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:27,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689697246] [2022-12-13 20:53:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:27,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:27,380 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 20:53:27,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:27,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689697246] [2022-12-13 20:53:27,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689697246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:27,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:27,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:53:27,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197528933] [2022-12-13 20:53:27,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:27,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:27,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:27,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:27,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:53:27,382 INFO L87 Difference]: Start difference. First operand 206 states and 247 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:27,579 INFO L93 Difference]: Finished difference Result 202 states and 240 transitions. [2022-12-13 20:53:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:53:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 20:53:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:27,580 INFO L225 Difference]: With dead ends: 202 [2022-12-13 20:53:27,580 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 20:53:27,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:53:27,581 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 15 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:27,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 434 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 20:53:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 196. [2022-12-13 20:53:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 154 states have (on average 1.5194805194805194) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2022-12-13 20:53:27,585 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 12 [2022-12-13 20:53:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:27,585 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2022-12-13 20:53:27,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2022-12-13 20:53:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:53:27,586 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:27,586 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:27,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:53:27,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1270421215, now seen corresponding path program 1 times [2022-12-13 20:53:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:27,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124929411] [2022-12-13 20:53:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:27,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:27,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124929411] [2022-12-13 20:53:27,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124929411] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:27,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:27,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:53:27,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636483458] [2022-12-13 20:53:27,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:27,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:53:27,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:27,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:53:27,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:53:27,637 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:27,732 INFO L93 Difference]: Finished difference Result 226 states and 249 transitions. [2022-12-13 20:53:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:53:27,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 20:53:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:27,734 INFO L225 Difference]: With dead ends: 226 [2022-12-13 20:53:27,734 INFO L226 Difference]: Without dead ends: 226 [2022-12-13 20:53:27,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:53:27,735 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 269 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:27,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 187 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-13 20:53:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 194. [2022-12-13 20:53:27,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 193 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2022-12-13 20:53:27,740 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 21 [2022-12-13 20:53:27,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:27,740 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2022-12-13 20:53:27,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2022-12-13 20:53:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:53:27,741 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:27,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:27,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:53:27,741 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:27,742 INFO L85 PathProgramCache]: Analyzing trace with hash -697189136, now seen corresponding path program 1 times [2022-12-13 20:53:27,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:27,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512150410] [2022-12-13 20:53:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:28,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512150410] [2022-12-13 20:53:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512150410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:53:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005177554] [2022-12-13 20:53:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:28,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:28,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:28,081 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:53:28,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:53:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 20:53:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:28,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:53:28,285 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 20:53:28,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 20:53:28,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:28,454 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 20:53:28,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-12-13 20:53:28,508 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 20:53:28,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 20:53:28,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:28,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 20:53:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:28,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:53:33,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:33,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 20:53:33,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:33,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-12-13 20:53:33,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-12-13 20:53:37,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:37,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005177554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:53:37,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:53:37,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 20:53:37,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135771432] [2022-12-13 20:53:37,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:53:37,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 20:53:37,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:37,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 20:53:37,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=741, Unknown=5, NotChecked=0, Total=870 [2022-12-13 20:53:37,733 INFO L87 Difference]: Start difference. First operand 194 states and 230 transitions. Second operand has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:41,130 INFO L93 Difference]: Finished difference Result 394 states and 451 transitions. [2022-12-13 20:53:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:53:41,131 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 20:53:41,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:41,131 INFO L225 Difference]: With dead ends: 394 [2022-12-13 20:53:41,131 INFO L226 Difference]: Without dead ends: 394 [2022-12-13 20:53:41,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=341, Invalid=1546, Unknown=5, NotChecked=0, Total=1892 [2022-12-13 20:53:41,132 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1134 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1134 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:41,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1134 Valid, 1247 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:53:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-13 20:53:41,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 216. [2022-12-13 20:53:41,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 175 states have (on average 1.4685714285714286) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2022-12-13 20:53:41,136 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 27 [2022-12-13 20:53:41,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:41,136 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2022-12-13 20:53:41,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.586206896551724) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:41,137 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2022-12-13 20:53:41,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:53:41,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:41,137 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:41,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:53:41,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:41,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:41,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:41,340 INFO L85 PathProgramCache]: Analyzing trace with hash -697189135, now seen corresponding path program 1 times [2022-12-13 20:53:41,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:41,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601187768] [2022-12-13 20:53:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:41,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:41,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601187768] [2022-12-13 20:53:41,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601187768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:53:41,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315636886] [2022-12-13 20:53:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:41,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:41,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:41,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:53:41,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:53:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:41,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 20:53:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:41,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:53:41,863 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:53:41,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:53:41,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:53:41,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:41,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:42,059 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:53:42,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 20:53:42,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 20:53:42,079 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 20:53:42,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-12-13 20:53:42,146 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 20:53:42,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 20:53:42,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 20:53:42,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:42,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:53:42,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:42,346 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:42,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-12-13 20:53:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:42,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:53:43,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:43,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 20:53:43,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:43,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-12-13 20:53:43,154 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:43,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2022-12-13 20:53:43,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:43,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 81 [2022-12-13 20:53:43,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-12-13 20:53:43,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-12-13 20:53:43,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:43,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 20:53:43,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:43,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-12-13 20:53:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:43,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315636886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:53:43,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:53:43,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-13 20:53:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383337680] [2022-12-13 20:53:43,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:53:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:53:43,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:43,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:53:43,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=883, Unknown=7, NotChecked=0, Total=992 [2022-12-13 20:53:43,531 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:45,560 INFO L93 Difference]: Finished difference Result 393 states and 450 transitions. [2022-12-13 20:53:45,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:53:45,560 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-13 20:53:45,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:45,561 INFO L225 Difference]: With dead ends: 393 [2022-12-13 20:53:45,561 INFO L226 Difference]: Without dead ends: 393 [2022-12-13 20:53:45,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=375, Invalid=1970, Unknown=7, NotChecked=0, Total=2352 [2022-12-13 20:53:45,562 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1150 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1150 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 2005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:45,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1150 Valid, 1291 Invalid, 2005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1906 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 20:53:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-13 20:53:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 216. [2022-12-13 20:53:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 175 states have (on average 1.4628571428571429) internal successors, (256), 215 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 256 transitions. [2022-12-13 20:53:45,565 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 256 transitions. Word has length 27 [2022-12-13 20:53:45,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:45,566 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 256 transitions. [2022-12-13 20:53:45,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 256 transitions. [2022-12-13 20:53:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:53:45,566 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:45,566 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:45,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:53:45,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 20:53:45,768 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:45,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:45,769 INFO L85 PathProgramCache]: Analyzing trace with hash 24881054, now seen corresponding path program 1 times [2022-12-13 20:53:45,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:45,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085527123] [2022-12-13 20:53:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:45,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:45,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085527123] [2022-12-13 20:53:45,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085527123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:45,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:45,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:53:45,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934626657] [2022-12-13 20:53:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:45,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:45,815 INFO L87 Difference]: Start difference. First operand 216 states and 256 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:45,824 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2022-12-13 20:53:45,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 20:53:45,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:45,826 INFO L225 Difference]: With dead ends: 218 [2022-12-13 20:53:45,826 INFO L226 Difference]: Without dead ends: 218 [2022-12-13 20:53:45,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:45,827 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 0 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:45,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 272 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:53:45,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-13 20:53:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-12-13 20:53:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 177 states have (on average 1.4576271186440677) internal successors, (258), 217 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 258 transitions. [2022-12-13 20:53:45,832 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 258 transitions. Word has length 29 [2022-12-13 20:53:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:45,833 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 258 transitions. [2022-12-13 20:53:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 258 transitions. [2022-12-13 20:53:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:53:45,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:45,834 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:45,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:53:45,835 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:45,835 INFO L85 PathProgramCache]: Analyzing trace with hash -197373836, now seen corresponding path program 1 times [2022-12-13 20:53:45,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:45,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641932603] [2022-12-13 20:53:45,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:45,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:45,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641932603] [2022-12-13 20:53:45,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641932603] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:45,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:45,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:53:45,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807926400] [2022-12-13 20:53:45,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:45,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:53:45,902 INFO L87 Difference]: Start difference. First operand 218 states and 258 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:46,139 INFO L93 Difference]: Finished difference Result 243 states and 288 transitions. [2022-12-13 20:53:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:53:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 20:53:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:46,140 INFO L225 Difference]: With dead ends: 243 [2022-12-13 20:53:46,140 INFO L226 Difference]: Without dead ends: 243 [2022-12-13 20:53:46,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:53:46,141 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 109 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:46,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 345 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:53:46,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-12-13 20:53:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 217. [2022-12-13 20:53:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 177 states have (on average 1.4519774011299436) internal successors, (257), 216 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 257 transitions. [2022-12-13 20:53:46,144 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 257 transitions. Word has length 32 [2022-12-13 20:53:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:46,144 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 257 transitions. [2022-12-13 20:53:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 257 transitions. [2022-12-13 20:53:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:53:46,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:46,145 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:46,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 20:53:46,145 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:46,145 INFO L85 PathProgramCache]: Analyzing trace with hash -197373835, now seen corresponding path program 1 times [2022-12-13 20:53:46,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:46,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705907454] [2022-12-13 20:53:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:46,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:46,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705907454] [2022-12-13 20:53:46,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705907454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:53:46,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306342399] [2022-12-13 20:53:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:46,557 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:53:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:53:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:46,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-13 20:53:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:46,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:53:46,699 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:53:46,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:53:46,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:46,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-13 20:53:46,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 20:53:46,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 20:53:47,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-13 20:53:47,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:47,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:47,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-12-13 20:53:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:47,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:53:47,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:47,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-12-13 20:53:47,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:47,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 20:53:47,644 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:53:47,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-13 20:53:47,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 20:53:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:47,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306342399] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:53:47,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:53:47,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-12-13 20:53:47,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270946886] [2022-12-13 20:53:47,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:53:47,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 20:53:47,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:47,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 20:53:47,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1478, Unknown=4, NotChecked=0, Total=1640 [2022-12-13 20:53:47,912 INFO L87 Difference]: Start difference. First operand 217 states and 257 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:50,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:50,801 INFO L93 Difference]: Finished difference Result 446 states and 509 transitions. [2022-12-13 20:53:50,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 20:53:50,802 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 20:53:50,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:50,803 INFO L225 Difference]: With dead ends: 446 [2022-12-13 20:53:50,803 INFO L226 Difference]: Without dead ends: 446 [2022-12-13 20:53:50,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1135, Invalid=5833, Unknown=4, NotChecked=0, Total=6972 [2022-12-13 20:53:50,805 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1437 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:50,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 1858 Invalid, 2861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 20:53:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-13 20:53:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 239. [2022-12-13 20:53:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 205 states have (on average 1.3853658536585365) internal successors, (284), 238 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 284 transitions. [2022-12-13 20:53:50,812 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 284 transitions. Word has length 32 [2022-12-13 20:53:50,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:50,812 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 284 transitions. [2022-12-13 20:53:50,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 284 transitions. [2022-12-13 20:53:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:53:50,813 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:50,813 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:50,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:53:51,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:51,014 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1018847574, now seen corresponding path program 1 times [2022-12-13 20:53:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:51,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991826387] [2022-12-13 20:53:51,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:51,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:51,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:51,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991826387] [2022-12-13 20:53:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991826387] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:51,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:53:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464431481] [2022-12-13 20:53:51,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:51,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:53:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:53:51,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:53:51,170 INFO L87 Difference]: Start difference. First operand 239 states and 284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:51,347 INFO L93 Difference]: Finished difference Result 255 states and 302 transitions. [2022-12-13 20:53:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:53:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 20:53:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:51,349 INFO L225 Difference]: With dead ends: 255 [2022-12-13 20:53:51,349 INFO L226 Difference]: Without dead ends: 255 [2022-12-13 20:53:51,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:53:51,350 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 46 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:51,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 488 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:51,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-13 20:53:51,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 247. [2022-12-13 20:53:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 213 states have (on average 1.3708920187793427) internal successors, (292), 246 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 292 transitions. [2022-12-13 20:53:51,355 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 292 transitions. Word has length 32 [2022-12-13 20:53:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:51,355 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 292 transitions. [2022-12-13 20:53:51,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 292 transitions. [2022-12-13 20:53:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:53:51,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:51,356 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:51,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 20:53:51,356 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:51,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1018907156, now seen corresponding path program 1 times [2022-12-13 20:53:51,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:51,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791628825] [2022-12-13 20:53:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:51,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:51,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791628825] [2022-12-13 20:53:51,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791628825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:51,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:51,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:53:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552902635] [2022-12-13 20:53:51,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:51,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:51,405 INFO L87 Difference]: Start difference. First operand 247 states and 292 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:51,463 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2022-12-13 20:53:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 20:53:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:51,464 INFO L225 Difference]: With dead ends: 245 [2022-12-13 20:53:51,464 INFO L226 Difference]: Without dead ends: 245 [2022-12-13 20:53:51,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:51,465 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 67 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:51,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 152 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-12-13 20:53:51,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-12-13 20:53:51,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 213 states have (on average 1.3474178403755868) internal successors, (287), 243 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 287 transitions. [2022-12-13 20:53:51,470 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 287 transitions. Word has length 32 [2022-12-13 20:53:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:51,470 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 287 transitions. [2022-12-13 20:53:51,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 287 transitions. [2022-12-13 20:53:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:53:51,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:51,471 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:51,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:53:51,471 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:51,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:51,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1018907157, now seen corresponding path program 1 times [2022-12-13 20:53:51,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:51,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908104537] [2022-12-13 20:53:51,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:51,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:51,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:51,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908104537] [2022-12-13 20:53:51,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908104537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:51,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:51,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:53:51,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407007931] [2022-12-13 20:53:51,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:51,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:53:51,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:51,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:53:51,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:51,543 INFO L87 Difference]: Start difference. First operand 244 states and 287 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:51,605 INFO L93 Difference]: Finished difference Result 241 states and 282 transitions. [2022-12-13 20:53:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:53:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 20:53:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:51,606 INFO L225 Difference]: With dead ends: 241 [2022-12-13 20:53:51,606 INFO L226 Difference]: Without dead ends: 241 [2022-12-13 20:53:51,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:53:51,607 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 72 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:51,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 136 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:53:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-13 20:53:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-12-13 20:53:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 213 states have (on average 1.323943661971831) internal successors, (282), 240 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 282 transitions. [2022-12-13 20:53:51,610 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 282 transitions. Word has length 32 [2022-12-13 20:53:51,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:51,610 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 282 transitions. [2022-12-13 20:53:51,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,610 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 282 transitions. [2022-12-13 20:53:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 20:53:51,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:51,611 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:51,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 20:53:51,611 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash 948343841, now seen corresponding path program 1 times [2022-12-13 20:53:51,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:51,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799108979] [2022-12-13 20:53:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799108979] [2022-12-13 20:53:51,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799108979] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:51,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:53:51,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:53:51,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342859460] [2022-12-13 20:53:51,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:53:51,673 INFO L87 Difference]: Start difference. First operand 241 states and 282 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:51,916 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-12-13 20:53:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:53:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 20:53:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:51,917 INFO L225 Difference]: With dead ends: 261 [2022-12-13 20:53:51,917 INFO L226 Difference]: Without dead ends: 261 [2022-12-13 20:53:51,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:53:51,917 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 92 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:51,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 321 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:53:51,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-13 20:53:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 247. [2022-12-13 20:53:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 219 states have (on average 1.3287671232876712) internal successors, (291), 246 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 291 transitions. [2022-12-13 20:53:51,921 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 291 transitions. Word has length 36 [2022-12-13 20:53:51,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:51,921 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 291 transitions. [2022-12-13 20:53:51,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 291 transitions. [2022-12-13 20:53:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 20:53:51,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:51,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:51,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:53:51,922 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash 948343842, now seen corresponding path program 1 times [2022-12-13 20:53:51,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:51,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219130171] [2022-12-13 20:53:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:52,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219130171] [2022-12-13 20:53:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219130171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:53:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070368699] [2022-12-13 20:53:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:52,354 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:53:52,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:53:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:53:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:52,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-12-13 20:53:52,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-12-13 20:53:52,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:53:52,560 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:53:52,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070368699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:53:52,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:53:52,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 18 [2022-12-13 20:53:52,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461546807] [2022-12-13 20:53:52,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:53:52,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:53:52,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:53:52,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:53:52,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:53:52,562 INFO L87 Difference]: Start difference. First operand 247 states and 291 transitions. Second operand has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:52,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:53:52,784 INFO L93 Difference]: Finished difference Result 256 states and 298 transitions. [2022-12-13 20:53:52,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:53:52,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-13 20:53:52,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:53:52,785 INFO L225 Difference]: With dead ends: 256 [2022-12-13 20:53:52,785 INFO L226 Difference]: Without dead ends: 256 [2022-12-13 20:53:52,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:53:52,786 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 53 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:53:52,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 389 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:53:52,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-13 20:53:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 245. [2022-12-13 20:53:52,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 219 states have (on average 1.3059360730593608) internal successors, (286), 244 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 286 transitions. [2022-12-13 20:53:52,791 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 286 transitions. Word has length 36 [2022-12-13 20:53:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:53:52,791 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 286 transitions. [2022-12-13 20:53:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:53:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 286 transitions. [2022-12-13 20:53:52,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 20:53:52,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:53:52,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:53:52,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:53:52,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 20:53:52,993 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-12-13 20:53:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:53:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -468812102, now seen corresponding path program 1 times [2022-12-13 20:53:52,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:53:52,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174424591] [2022-12-13 20:53:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:53:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:53,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:53:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174424591] [2022-12-13 20:53:53,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174424591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:53:53,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487995348] [2022-12-13 20:53:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:53:53,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:53:53,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:53:53,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:53:53,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_10f03271-48f2-4b43-a89f-743ee2a2c44d/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:53:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:53:53,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-13 20:53:53,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:53:53,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:53:53,690 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:53:53,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:53:53,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:53,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:53:53,828 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-13 20:53:53,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-12-13 20:53:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:53,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-12-13 20:53:53,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:53:53,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:53,930 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 20:53:53,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 70 [2022-12-13 20:53:53,944 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-12-13 20:53:53,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2022-12-13 20:53:54,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:54,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:54,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:54,407 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-12-13 20:53:54,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 42 [2022-12-13 20:53:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:53:54,416 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 20:53:54,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 22 [2022-12-13 20:53:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:53:54,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:54:05,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:05,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 32267 treesize of output 29776 [2022-12-13 20:54:07,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:54:09,803 INFO L321 Elim1Store]: treesize reduction 606, result has 56.1 percent of original size [2022-12-13 20:54:09,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 16 new quantified variables, introduced 106 case distinctions, treesize of input 323740 treesize of output 305844 [2022-12-13 20:54:32,672 WARN L233 SmtUtils]: Spent 22.86s on a formula simplification. DAG size of input: 1305 DAG size of output: 1256 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-12-13 20:54:34,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:54:34,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 352036 treesize of output 302986 [2022-12-13 20:54:36,673 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 20:54:36,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2022-12-13 20:54:41,136 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 20:54:41,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-12-13 20:54:43,097 INFO L321 Elim1Store]: treesize reduction 62, result has 52.7 percent of original size [2022-12-13 20:54:43,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 101 treesize of output 155 [2022-12-13 20:54:48,135 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 20:54:48,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-12-13 20:54:50,657 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 20:54:50,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-12-13 20:54:52,962 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-12-13 20:54:52,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 59 [2022-12-13 20:55:06,139 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 966 DAG size of output: 966 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)