./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/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_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 --- 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 20:14:47,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:14:47,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:14:47,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:14:47,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:14:47,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:14:47,221 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:14:47,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:14:47,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:14:47,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:14:47,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:14:47,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:14:47,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:14:47,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:14:47,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:14:47,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:14:47,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:14:47,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:14:47,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:14:47,231 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:14:47,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:14:47,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:14:47,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:14:47,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:14:47,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:14:47,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:14:47,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:14:47,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:14:47,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:14:47,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:14:47,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:14:47,239 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:14:47,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:14:47,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:14:47,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:14:47,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:14:47,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:14:47,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:14:47,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:14:47,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:14:47,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:14:47,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:14:47,257 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:14:47,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:14:47,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:14:47,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:14:47,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:14:47,258 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:14:47,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:14:47,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:14:47,259 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:14:47,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:14:47,259 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:14:47,259 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:14:47,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:14:47,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:14:47,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:14:47,265 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:14:47,265 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:14:47,265 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:14:47,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:14:47,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:14:47,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:14:47,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:14:47,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:14:47,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:14:47,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:14:47,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:14:47,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:14:47,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:14:47,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:14:47,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:14:47,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:14:47,268 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:14:47,268 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:14:47,268 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:14:47,268 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_1982851a-c707-4b77-9c2c-9d04afc07374/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0283c4a072a13e5b82b0728b718582152e385c6ee1404b3ed9be4e37b84a0b2 [2022-12-13 20:14:47,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:14:47,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:14:47,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:14:47,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:14:47,453 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:14:47,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2022-12-13 20:14:50,097 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:14:50,277 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:14:50,278 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2022-12-13 20:14:50,288 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/data/c793eac0a/28efbb7d9e744b0fb6c71bff55c34861/FLAG57a2597c8 [2022-12-13 20:14:50,302 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/data/c793eac0a/28efbb7d9e744b0fb6c71bff55c34861 [2022-12-13 20:14:50,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:14:50,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:14:50,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:14:50,307 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:14:50,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:14:50,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71c26ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50, skipping insertion in model container [2022-12-13 20:14:50,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:14:50,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:14:50,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:14:50,542 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:14:50,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:14:50,584 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:14:50,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50 WrapperNode [2022-12-13 20:14:50,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:14:50,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:14:50,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:14:50,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:14:50,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,613 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-12-13 20:14:50,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:14:50,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:14:50,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:14:50,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:14:50,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,630 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:14:50,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:14:50,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:14:50,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:14:50,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (1/1) ... [2022-12-13 20:14:50,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:14:50,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:50,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:14:50,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:14:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:14:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:14:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:14:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:14:50,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:14:50,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:14:50,769 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:14:50,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:14:50,943 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:14:50,948 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:14:50,948 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:14:50,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:14:50 BoogieIcfgContainer [2022-12-13 20:14:50,950 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:14:50,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:14:50,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:14:50,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:14:50,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:14:50" (1/3) ... [2022-12-13 20:14:50,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c9293d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:14:50, skipping insertion in model container [2022-12-13 20:14:50,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:14:50" (2/3) ... [2022-12-13 20:14:50,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c9293d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:14:50, skipping insertion in model container [2022-12-13 20:14:50,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:14:50" (3/3) ... [2022-12-13 20:14:50,956 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2022-12-13 20:14:50,969 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:14:50,969 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-12-13 20:14:51,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:14:51,004 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;@35991666, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:14:51,005 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-12-13 20:14:51,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 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 20:14:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:14:51,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:51,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:51,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:51,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:51,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-12-13 20:14:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:51,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688737564] [2022-12-13 20:14:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:51,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:51,208 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 20:14:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:51,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688737564] [2022-12-13 20:14:51,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688737564] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:51,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:51,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:51,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374299483] [2022-12-13 20:14:51,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:51,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:51,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:51,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:51,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:51,239 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 53 states have internal predecessors, (64), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 20:14:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:51,289 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-12-13 20:14:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-12-13 20:14:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:51,300 INFO L225 Difference]: With dead ends: 100 [2022-12-13 20:14:51,301 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 20:14:51,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:51,306 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:51,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:51,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 20:14:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-12-13 20:14:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 states have internal predecessors, (63), 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 20:14:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-12-13 20:14:51,340 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-12-13 20:14:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:51,340 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-12-13 20:14:51,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 20:14:51,341 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-12-13 20:14:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:14:51,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:51,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:51,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:14:51,342 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:51,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:51,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-12-13 20:14:51,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:51,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905130719] [2022-12-13 20:14:51,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:51,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:51,552 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 20:14:51,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:51,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905130719] [2022-12-13 20:14:51,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905130719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:51,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:51,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:14:51,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626484481] [2022-12-13 20:14:51,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:51,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:14:51,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:51,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:14:51,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:14:51,556 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 20:14:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:51,593 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-12-13 20:14:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:14:51,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-12-13 20:14:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:51,594 INFO L225 Difference]: With dead ends: 53 [2022-12-13 20:14:51,594 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 20:14:51,595 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 20:14:51,596 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:51,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:51,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 20:14:51,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 20:14:51,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 52 states have internal predecessors, (61), 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 20:14:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-13 20:14:51,602 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-12-13 20:14:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:51,602 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-13 20:14:51,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 20:14:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-13 20:14:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 20:14:51,603 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:51,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:51,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:14:51,604 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:51,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-12-13 20:14:51,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:51,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661707234] [2022-12-13 20:14:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:51,744 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 20:14:51,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:51,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661707234] [2022-12-13 20:14:51,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661707234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:51,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:51,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:51,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675059220] [2022-12-13 20:14:51,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:51,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:14:51,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:51,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:14:51,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:14:51,746 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 20:14:51,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:51,855 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-12-13 20:14:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:14:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2022-12-13 20:14:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:51,856 INFO L225 Difference]: With dead ends: 97 [2022-12-13 20:14:51,856 INFO L226 Difference]: Without dead ends: 97 [2022-12-13 20:14:51,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:14:51,857 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 102 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:51,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 96 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-13 20:14:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-12-13 20:14:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 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 20:14:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 20:14:51,861 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-12-13 20:14:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:51,861 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 20:14:51,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 20:14:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 20:14:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:14:51,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:51,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:14:51,862 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:51,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-12-13 20:14:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:51,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450058591] [2022-12-13 20:14:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:51,960 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 20:14:51,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:51,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450058591] [2022-12-13 20:14:51,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450058591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:51,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:51,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:14:51,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885763561] [2022-12-13 20:14:51,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:51,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:51,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:51,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:51,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:51,962 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 20:14:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,003 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2022-12-13 20:14:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:52,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-12-13 20:14:52,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,004 INFO L225 Difference]: With dead ends: 94 [2022-12-13 20:14:52,004 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 20:14:52,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:52,005 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 83 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 90 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 20:14:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-12-13 20:14:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.6590909090909092) internal successors, (73), 60 states have internal predecessors, (73), 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 20:14:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-12-13 20:14:52,009 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-12-13 20:14:52,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,009 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-12-13 20:14:52,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 20:14:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-12-13 20:14:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:14:52,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:14:52,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,010 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-12-13 20:14:52,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744206858] [2022-12-13 20:14:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,039 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 20:14:52,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744206858] [2022-12-13 20:14:52,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744206858] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218270911] [2022-12-13 20:14:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:52,041 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 20:14:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,060 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2022-12-13 20:14:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-12-13 20:14:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,062 INFO L225 Difference]: With dead ends: 109 [2022-12-13 20:14:52,062 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 20:14:52,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:52,063 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 20:14:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2022-12-13 20:14:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 73 states have internal predecessors, (89), 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 20:14:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2022-12-13 20:14:52,068 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 9 [2022-12-13 20:14:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,068 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2022-12-13 20:14:52,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 20:14:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2022-12-13 20:14:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:14:52,068 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:14:52,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-12-13 20:14:52,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423396303] [2022-12-13 20:14:52,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,094 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 20:14:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423396303] [2022-12-13 20:14:52,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423396303] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:14:52,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226079384] [2022-12-13 20:14:52,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:14:52,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:14:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:14:52,097 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 20:14:52,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,121 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-12-13 20:14:52,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:14:52,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-12-13 20:14:52,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,123 INFO L225 Difference]: With dead ends: 72 [2022-12-13 20:14:52,123 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 20:14:52,123 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 20:14:52,124 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:52,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 20:14:52,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-12-13 20:14:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 71 states have internal predecessors, (86), 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 20:14:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-12-13 20:14:52,129 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 9 [2022-12-13 20:14:52,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,129 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-12-13 20:14:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 20:14:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-12-13 20:14:52,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:14:52,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 20:14:52,130 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-12-13 20:14:52,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320908362] [2022-12-13 20:14:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,246 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 20:14:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320908362] [2022-12-13 20:14:52,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320908362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:14:52,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985595743] [2022-12-13 20:14:52,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:14:52,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:14:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:14:52,248 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 20:14:52,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,344 INFO L93 Difference]: Finished difference Result 113 states and 132 transitions. [2022-12-13 20:14:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:14:52,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2022-12-13 20:14:52,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,345 INFO L225 Difference]: With dead ends: 113 [2022-12-13 20:14:52,346 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 20:14:52,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:14:52,347 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 214 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 86 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 20:14:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2022-12-13 20:14:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.5081967213114753) internal successors, (92), 75 states have internal predecessors, (92), 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 20:14:52,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-12-13 20:14:52,351 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 9 [2022-12-13 20:14:52,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,351 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-12-13 20:14:52,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 20:14:52,352 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-12-13 20:14:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:14:52,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:14:52,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-12-13 20:14:52,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993011215] [2022-12-13 20:14:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,436 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 20:14:52,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993011215] [2022-12-13 20:14:52,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993011215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696371885] [2022-12-13 20:14:52,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:14:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:14:52,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:14:52,438 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 20:14:52,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,471 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2022-12-13 20:14:52,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:14:52,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-12-13 20:14:52,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,472 INFO L225 Difference]: With dead ends: 75 [2022-12-13 20:14:52,472 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 20:14:52,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:14:52,473 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 35 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 20:14:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2022-12-13 20:14:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 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 20:14:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-12-13 20:14:52,478 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-12-13 20:14:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,478 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-12-13 20:14:52,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 20:14:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-12-13 20:14:52,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 20:14:52,479 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:14:52,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-12-13 20:14:52,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011506234] [2022-12-13 20:14:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,568 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 20:14:52,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011506234] [2022-12-13 20:14:52,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011506234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:14:52,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003088005] [2022-12-13 20:14:52,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:52,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:52,571 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:14:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,629 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2022-12-13 20:14:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:52,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 20:14:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,630 INFO L225 Difference]: With dead ends: 96 [2022-12-13 20:14:52,630 INFO L226 Difference]: Without dead ends: 96 [2022-12-13 20:14:52,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:52,631 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 37 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 113 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:52,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-13 20:14:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2022-12-13 20:14:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 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 20:14:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-12-13 20:14:52,635 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 10 [2022-12-13 20:14:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,635 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-12-13 20:14:52,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:14:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-12-13 20:14:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 20:14:52,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:14:52,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-12-13 20:14:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233431433] [2022-12-13 20:14:52,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:52,795 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 20:14:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:52,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233431433] [2022-12-13 20:14:52,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233431433] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:52,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:52,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:14:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127902028] [2022-12-13 20:14:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:52,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:14:52,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:14:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:14:52,797 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:14:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:52,885 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2022-12-13 20:14:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:14:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:14:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:52,886 INFO L225 Difference]: With dead ends: 99 [2022-12-13 20:14:52,886 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 20:14:52,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:14:52,887 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 127 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:52,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 92 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 20:14:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2022-12-13 20:14:52,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 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 20:14:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-12-13 20:14:52,891 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 10 [2022-12-13 20:14:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:52,892 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-12-13 20:14:52,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 20:14:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-12-13 20:14:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:14:52,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:52,893 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:52,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 20:14:52,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-12-13 20:14:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:52,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975500366] [2022-12-13 20:14:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:52,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:53,039 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 20:14:53,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:53,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975500366] [2022-12-13 20:14:53,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975500366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:53,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191593826] [2022-12-13 20:14:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:53,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:53,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:53,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:14:53,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:14:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:53,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 20:14:53,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:14:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:14:53,187 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 9 treesize of output 11 [2022-12-13 20:14:53,194 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 10 treesize of output 8 [2022-12-13 20:14:53,303 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 20:14:53,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:14:53,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:14:53,434 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 20:14:53,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191593826] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:14:53,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:14:53,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 20:14:53,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801785249] [2022-12-13 20:14:53,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:14:53,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:14:53,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:53,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:14:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:14:53,435 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 20:14:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:53,723 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-12-13 20:14:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:14:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 11 [2022-12-13 20:14:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:53,724 INFO L225 Difference]: With dead ends: 113 [2022-12-13 20:14:53,724 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 20:14:53,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:14:53,725 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 300 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:53,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 308 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 20:14:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 62. [2022-12-13 20:14:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.469387755102041) internal successors, (72), 61 states have internal predecessors, (72), 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 20:14:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-12-13 20:14:53,729 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 11 [2022-12-13 20:14:53,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:53,729 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-12-13 20:14:53,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 20:14:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-12-13 20:14:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:14:53,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:53,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:53,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:14:53,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:53,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:53,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2022-12-13 20:14:53,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:53,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146237407] [2022-12-13 20:14:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:53,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:54,071 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 20:14:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:54,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146237407] [2022-12-13 20:14:54,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146237407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:54,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:54,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:14:54,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487472997] [2022-12-13 20:14:54,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:54,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:54,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:54,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:54,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:54,074 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 20:14:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:54,110 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-12-13 20:14:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:54,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 13 [2022-12-13 20:14:54,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:54,111 INFO L225 Difference]: With dead ends: 60 [2022-12-13 20:14:54,111 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 20:14:54,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:14:54,111 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:54,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 53 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 20:14:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-13 20:14:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 59 states have internal predecessors, (70), 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 20:14:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-12-13 20:14:54,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 13 [2022-12-13 20:14:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:54,114 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-12-13 20:14:54,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 20:14:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-12-13 20:14:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:14:54,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:54,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 20:14:54,114 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2022-12-13 20:14:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:54,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351663598] [2022-12-13 20:14:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:54,180 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 20:14:54,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:54,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351663598] [2022-12-13 20:14:54,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351663598] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:54,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:54,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:14:54,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724385200] [2022-12-13 20:14:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:54,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:14:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:14:54,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:14:54,182 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 20:14:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:54,240 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2022-12-13 20:14:54,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:14:54,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 13 [2022-12-13 20:14:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:54,241 INFO L225 Difference]: With dead ends: 91 [2022-12-13 20:14:54,241 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 20:14:54,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:14:54,241 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 184 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:54,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 83 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 20:14:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2022-12-13 20:14:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 64 states have internal predecessors, (78), 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 20:14:54,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-12-13 20:14:54,243 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 13 [2022-12-13 20:14:54,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:54,243 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-12-13 20:14:54,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 20:14:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-12-13 20:14:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:14:54,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:54,244 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:54,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 20:14:54,244 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-12-13 20:14:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:54,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701440310] [2022-12-13 20:14:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:54,413 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 20:14:54,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:54,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701440310] [2022-12-13 20:14:54,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701440310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:54,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545972157] [2022-12-13 20:14:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:54,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:54,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:54,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:14:54,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:14:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:14:54,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:14:54,487 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:14:54,487 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 20:14:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:54,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:14:54,855 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 20:14:54,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545972157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:14:54,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:14:54,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-12-13 20:14:54,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230714125] [2022-12-13 20:14:54,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:14:54,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:14:54,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:54,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:14:54,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:14:54,857 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 20:14:55,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:55,183 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2022-12-13 20:14:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:14:55,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 13 [2022-12-13 20:14:55,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:55,184 INFO L225 Difference]: With dead ends: 132 [2022-12-13 20:14:55,184 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 20:14:55,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:14:55,184 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 375 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:55,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 346 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:14:55,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 20:14:55,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 63. [2022-12-13 20:14:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 62 states have internal predecessors, (76), 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 20:14:55,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-12-13 20:14:55,186 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 13 [2022-12-13 20:14:55,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:55,186 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-12-13 20:14:55,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 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 20:14:55,187 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-12-13 20:14:55,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 20:14:55,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:55,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:55,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:14:55,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 20:14:55,388 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:55,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:55,388 INFO L85 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2022-12-13 20:14:55,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:55,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123217772] [2022-12-13 20:14:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:55,476 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 20:14:55,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:55,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123217772] [2022-12-13 20:14:55,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123217772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:55,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:55,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:14:55,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601011471] [2022-12-13 20:14:55,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:55,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:55,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:55,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:55,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:55,477 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 20:14:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:55,499 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-12-13 20:14:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-12-13 20:14:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:55,500 INFO L225 Difference]: With dead ends: 62 [2022-12-13 20:14:55,500 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 20:14:55,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:55,501 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 36 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:55,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 68 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 20:14:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-12-13 20:14:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 57 states have internal predecessors, (68), 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 20:14:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2022-12-13 20:14:55,503 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 14 [2022-12-13 20:14:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:55,503 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2022-12-13 20:14:55,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 20:14:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2022-12-13 20:14:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 20:14:55,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:55,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:55,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 20:14:55,505 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1912378887, now seen corresponding path program 1 times [2022-12-13 20:14:55,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:55,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332609427] [2022-12-13 20:14:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:55,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:55,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332609427] [2022-12-13 20:14:55,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332609427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:55,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040351012] [2022-12-13 20:14:55,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:55,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:55,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:55,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:14:55,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:14:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:14:55,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:14:55,742 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 20:14:55,743 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-12-13 20:14:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:55,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:14:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040351012] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:56,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:14:56,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2022-12-13 20:14:56,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777960572] [2022-12-13 20:14:56,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:14:56,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:14:56,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:14:56,002 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 20:14:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:56,136 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-12-13 20:14:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:14:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2022-12-13 20:14:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:56,137 INFO L225 Difference]: With dead ends: 58 [2022-12-13 20:14:56,137 INFO L226 Difference]: Without dead ends: 58 [2022-12-13 20:14:56,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:14:56,138 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:56,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 48 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-13 20:14:56,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2022-12-13 20:14:56,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 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 20:14:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-12-13 20:14:56,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-12-13 20:14:56,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:56,141 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-12-13 20:14:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 20:14:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-12-13 20:14:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 20:14:56,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:56,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:56,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:14:56,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:14:56,343 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:56,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2022-12-13 20:14:56,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:56,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475645942] [2022-12-13 20:14:56,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:56,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:56,480 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 20:14:56,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:56,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475645942] [2022-12-13 20:14:56,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475645942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:56,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:56,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:56,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786556528] [2022-12-13 20:14:56,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:14:56,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:14:56,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:14:56,483 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 20:14:56,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:56,533 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-12-13 20:14:56,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:14:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2022-12-13 20:14:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:56,534 INFO L225 Difference]: With dead ends: 53 [2022-12-13 20:14:56,534 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 20:14:56,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:14:56,535 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:56,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:56,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 20:14:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-12-13 20:14:56,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 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 20:14:56,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-12-13 20:14:56,537 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 15 [2022-12-13 20:14:56,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:56,537 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-12-13 20:14:56,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 20:14:56,537 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-12-13 20:14:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 20:14:56,537 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:56,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:14:56,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2022-12-13 20:14:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517170916] [2022-12-13 20:14:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:56,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:56,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:56,631 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 20:14:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:56,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517170916] [2022-12-13 20:14:56,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517170916] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:56,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:56,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:14:56,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439457632] [2022-12-13 20:14:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:14:56,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:14:56,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:14:56,633 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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 20:14:56,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:56,705 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-12-13 20:14:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:14:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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 15 [2022-12-13 20:14:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:56,705 INFO L225 Difference]: With dead ends: 57 [2022-12-13 20:14:56,705 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 20:14:56,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:14:56,706 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:56,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 77 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 20:14:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2022-12-13 20:14:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 52 states have internal predecessors, (60), 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 20:14:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-12-13 20:14:56,708 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 15 [2022-12-13 20:14:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:56,708 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-12-13 20:14:56,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 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 20:14:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-12-13 20:14:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:14:56,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:56,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 20:14:56,709 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2022-12-13 20:14:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:56,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862971596] [2022-12-13 20:14:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:56,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:56,733 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 20:14:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:56,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862971596] [2022-12-13 20:14:56,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862971596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:56,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:56,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:14:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713995865] [2022-12-13 20:14:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:14:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:14:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:14:56,734 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 20:14:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:56,760 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-13 20:14:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:14:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 17 [2022-12-13 20:14:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:56,761 INFO L225 Difference]: With dead ends: 52 [2022-12-13 20:14:56,761 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 20:14:56,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:14:56,761 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:56,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 20:14:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-13 20:14:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 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 20:14:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-12-13 20:14:56,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 17 [2022-12-13 20:14:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:56,763 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-12-13 20:14:56,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 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 20:14:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-12-13 20:14:56,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:14:56,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:56,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 20:14:56,764 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:56,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2022-12-13 20:14:56,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:56,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983418451] [2022-12-13 20:14:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:56,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:56,846 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 20:14:56,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:56,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983418451] [2022-12-13 20:14:56,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983418451] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:56,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:56,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:14:56,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349913121] [2022-12-13 20:14:56,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:14:56,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:14:56,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:14:56,848 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 20:14:56,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:56,923 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-12-13 20:14:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:14:56,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 17 [2022-12-13 20:14:56,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:56,924 INFO L225 Difference]: With dead ends: 70 [2022-12-13 20:14:56,925 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 20:14:56,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:14:56,925 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:56,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 90 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 20:14:56,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2022-12-13 20:14:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 52 states have internal predecessors, (60), 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 20:14:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2022-12-13 20:14:56,928 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2022-12-13 20:14:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:56,928 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2022-12-13 20:14:56,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 20:14:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2022-12-13 20:14:56,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 20:14:56,929 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:56,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:56,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 20:14:56,929 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2022-12-13 20:14:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4172842] [2022-12-13 20:14:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:56,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:56,972 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 20:14:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:56,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4172842] [2022-12-13 20:14:56,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4172842] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:56,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:56,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:14:56,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63107837] [2022-12-13 20:14:56,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:56,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:14:56,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:14:56,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:14:56,974 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 20:14:57,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:57,006 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-13 20:14:57,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:14:57,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2022-12-13 20:14:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:57,006 INFO L225 Difference]: With dead ends: 52 [2022-12-13 20:14:57,006 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 20:14:57,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:14:57,007 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:57,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 20:14:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-13 20:14:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 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 20:14:57,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-12-13 20:14:57,009 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 19 [2022-12-13 20:14:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:57,009 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-12-13 20:14:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 20:14:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-12-13 20:14:57,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 20:14:57,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:57,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:57,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 20:14:57,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:57,010 INFO L85 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2022-12-13 20:14:57,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:57,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502101251] [2022-12-13 20:14:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:57,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:57,141 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 20:14:57,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:57,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502101251] [2022-12-13 20:14:57,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502101251] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:57,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:57,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:14:57,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880646759] [2022-12-13 20:14:57,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:57,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:14:57,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:57,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:14:57,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:14:57,143 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 20:14:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:57,282 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2022-12-13 20:14:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:14:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 19 [2022-12-13 20:14:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:57,283 INFO L225 Difference]: With dead ends: 64 [2022-12-13 20:14:57,283 INFO L226 Difference]: Without dead ends: 61 [2022-12-13 20:14:57,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:14:57,284 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 86 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:57,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 110 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:57,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-13 20:14:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2022-12-13 20:14:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 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 20:14:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-12-13 20:14:57,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 19 [2022-12-13 20:14:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:57,286 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-12-13 20:14:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 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 20:14:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-12-13 20:14:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:14:57,287 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:57,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 20:14:57,287 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2022-12-13 20:14:57,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:57,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635739849] [2022-12-13 20:14:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:57,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:57,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:57,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635739849] [2022-12-13 20:14:57,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635739849] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:57,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:57,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 20:14:57,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970853215] [2022-12-13 20:14:57,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:14:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:14:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:14:57,440 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 20:14:57,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:57,529 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-12-13 20:14:57,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:14:57,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 20:14:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:57,530 INFO L225 Difference]: With dead ends: 68 [2022-12-13 20:14:57,530 INFO L226 Difference]: Without dead ends: 46 [2022-12-13 20:14:57,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 20:14:57,531 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:57,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 187 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:14:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-13 20:14:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-13 20:14:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 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 20:14:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-12-13 20:14:57,532 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 21 [2022-12-13 20:14:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:57,532 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-12-13 20:14:57,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 20:14:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-12-13 20:14:57,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:14:57,533 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:57,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:57,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 20:14:57,533 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1530543595, now seen corresponding path program 1 times [2022-12-13 20:14:57,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:57,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692331432] [2022-12-13 20:14:57,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:57,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:14:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:57,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692331432] [2022-12-13 20:14:57,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692331432] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:57,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:57,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 20:14:57,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349750782] [2022-12-13 20:14:57,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:14:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:57,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:14:57,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:14:57,739 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 20:14:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:57,829 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-12-13 20:14:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:14:57,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 20:14:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:57,830 INFO L225 Difference]: With dead ends: 71 [2022-12-13 20:14:57,830 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 20:14:57,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:14:57,830 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:57,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 20:14:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2022-12-13 20:14:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 47 states have internal predecessors, (52), 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 20:14:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-12-13 20:14:57,832 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 21 [2022-12-13 20:14:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:57,832 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-12-13 20:14:57,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 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 20:14:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-12-13 20:14:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 20:14:57,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:57,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:57,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 20:14:57,832 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1247746578, now seen corresponding path program 1 times [2022-12-13 20:14:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:57,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123256126] [2022-12-13 20:14:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:57,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:57,952 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 20:14:57,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:57,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123256126] [2022-12-13 20:14:57,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123256126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:57,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80317598] [2022-12-13 20:14:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:57,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:57,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:57,953 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:14:57,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:14:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:58,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:14:58,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:14:58,096 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 20:14:58,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:14:58,200 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 20:14:58,218 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 20:14:58,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80317598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:14:58,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:14:58,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-12-13 20:14:58,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109292773] [2022-12-13 20:14:58,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:14:58,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:14:58,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:58,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:14:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:14:58,220 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 20:14:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:58,417 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-12-13 20:14:58,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:14:58,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 25 [2022-12-13 20:14:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:58,418 INFO L225 Difference]: With dead ends: 65 [2022-12-13 20:14:58,418 INFO L226 Difference]: Without dead ends: 65 [2022-12-13 20:14:58,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:14:58,419 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 181 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:58,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 186 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-13 20:14:58,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-12-13 20:14:58,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 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 20:14:58,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-12-13 20:14:58,420 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 25 [2022-12-13 20:14:58,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:58,420 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-12-13 20:14:58,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.235294117647059) internal successors, (55), 18 states have internal predecessors, (55), 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 20:14:58,421 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-12-13 20:14:58,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:14:58,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:58,421 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 20:14:58,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 20:14:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 20:14:58,622 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -788585585, now seen corresponding path program 1 times [2022-12-13 20:14:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609050596] [2022-12-13 20:14:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:58,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:14:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:58,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609050596] [2022-12-13 20:14:58,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609050596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:58,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:58,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 20:14:58,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63999715] [2022-12-13 20:14:58,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:14:58,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:58,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:14:58,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:14:58,792 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 20:14:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:58,919 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-12-13 20:14:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:14:58,919 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 20:14:58,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:58,920 INFO L225 Difference]: With dead ends: 61 [2022-12-13 20:14:58,920 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 20:14:58,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:14:58,920 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:58,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 218 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:58,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 20:14:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-12-13 20:14:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 42 states have internal predecessors, (45), 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 20:14:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-12-13 20:14:58,921 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 27 [2022-12-13 20:14:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:58,922 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-12-13 20:14:58,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 20:14:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-12-13 20:14:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:14:58,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:58,922 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 20:14:58,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 20:14:58,922 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:58,922 INFO L85 PathProgramCache]: Analyzing trace with hash -922599091, now seen corresponding path program 1 times [2022-12-13 20:14:58,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:58,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810689743] [2022-12-13 20:14:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:58,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:14:59,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:59,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810689743] [2022-12-13 20:14:59,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810689743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:14:59,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:14:59,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-12-13 20:14:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400374423] [2022-12-13 20:14:59,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:14:59,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:14:59,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:59,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:14:59,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:14:59,117 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 20:14:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:14:59,306 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-12-13 20:14:59,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:14:59,307 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 20:14:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:14:59,307 INFO L225 Difference]: With dead ends: 57 [2022-12-13 20:14:59,307 INFO L226 Difference]: Without dead ends: 47 [2022-12-13 20:14:59,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:14:59,308 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:14:59,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 190 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:14:59,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-12-13 20:14:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2022-12-13 20:14:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 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 20:14:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-12-13 20:14:59,310 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-12-13 20:14:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:14:59,310 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-12-13 20:14:59,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 20:14:59,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-12-13 20:14:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 20:14:59,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:14:59,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:14:59,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 20:14:59,311 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:14:59,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:14:59,312 INFO L85 PathProgramCache]: Analyzing trace with hash 904511312, now seen corresponding path program 1 times [2022-12-13 20:14:59,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:14:59,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996487273] [2022-12-13 20:14:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:14:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:14:59,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:14:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996487273] [2022-12-13 20:14:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996487273] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:14:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284346316] [2022-12-13 20:14:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:14:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:14:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:14:59,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:14:59,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:14:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:14:59,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:14:59,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:14:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:14:59,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:14:59,785 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 20:14:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:14:59,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284346316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:14:59,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:14:59,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-12-13 20:14:59,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399263944] [2022-12-13 20:14:59,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:14:59,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:14:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:14:59,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:14:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:14:59,809 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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 20:15:00,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:00,102 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-12-13 20:15:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:15:00,103 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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 31 [2022-12-13 20:15:00,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:00,103 INFO L225 Difference]: With dead ends: 50 [2022-12-13 20:15:00,103 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 20:15:00,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2022-12-13 20:15:00,104 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:00,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 168 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:00,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 20:15:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-12-13 20:15:00,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 45 states have internal predecessors, (48), 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 20:15:00,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-12-13 20:15:00,107 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2022-12-13 20:15:00,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:00,107 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-12-13 20:15:00,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 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 20:15:00,107 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-12-13 20:15:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 20:15:00,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:00,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:00,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:15:00,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 20:15:00,308 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:00,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1651977841, now seen corresponding path program 1 times [2022-12-13 20:15:00,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:00,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141320223] [2022-12-13 20:15:00,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:15:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141320223] [2022-12-13 20:15:00,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141320223] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006360419] [2022-12-13 20:15:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:00,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:00,418 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:00,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:15:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:15:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:00,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:00,688 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 20:15:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:00,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006360419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:00,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:00,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-12-13 20:15:00,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770017506] [2022-12-13 20:15:00,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:00,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:15:00,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:15:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:15:00,712 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 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 20:15:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:00,912 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-12-13 20:15:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:15:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 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 33 [2022-12-13 20:15:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:00,913 INFO L225 Difference]: With dead ends: 45 [2022-12-13 20:15:00,913 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 20:15:00,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-12-13 20:15:00,915 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 132 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:00,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 168 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 20:15:00,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-12-13 20:15:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 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 20:15:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-12-13 20:15:00,916 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 33 [2022-12-13 20:15:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:00,917 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-12-13 20:15:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 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 20:15:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-12-13 20:15:00,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 20:15:00,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:00,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:00,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 20:15:01,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 20:15:01,119 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:01,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1587501230, now seen corresponding path program 1 times [2022-12-13 20:15:01,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:01,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774470367] [2022-12-13 20:15:01,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:01,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:01,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774470367] [2022-12-13 20:15:01,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774470367] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:01,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074860540] [2022-12-13 20:15:01,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:01,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:01,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:01,423 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:01,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:15:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:01,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 20:15:01,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:01,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:01,703 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 20:15:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074860540] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:01,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:01,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-12-13 20:15:01,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643974494] [2022-12-13 20:15:01,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:15:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:15:01,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:15:01,724 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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 20:15:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:01,906 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-12-13 20:15:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:15:01,907 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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 35 [2022-12-13 20:15:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:01,907 INFO L225 Difference]: With dead ends: 59 [2022-12-13 20:15:01,907 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 20:15:01,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2022-12-13 20:15:01,908 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 138 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:01,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 202 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:01,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 20:15:01,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-12-13 20:15:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 45 states have internal predecessors, (48), 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 20:15:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-12-13 20:15:01,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2022-12-13 20:15:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:01,910 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-12-13 20:15:01,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.272727272727273) internal successors, (72), 23 states have internal predecessors, (72), 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 20:15:01,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-12-13 20:15:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 20:15:01,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:01,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-12-13 20:15:01,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:15:02,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:02,113 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash -579332495, now seen corresponding path program 1 times [2022-12-13 20:15:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:02,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398393263] [2022-12-13 20:15:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:02,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:02,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:02,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398393263] [2022-12-13 20:15:02,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398393263] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:02,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762150049] [2022-12-13 20:15:02,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:02,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:02,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:02,584 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:02,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:15:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:02,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-13 20:15:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:02,741 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 14 treesize of output 10 [2022-12-13 20:15:03,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:15:03,228 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-12-13 20:15:03,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:15:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:03,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:05,564 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:05,564 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 99 treesize of output 99 [2022-12-13 20:15:05,577 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 38 treesize of output 34 [2022-12-13 20:15:05,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:05,597 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 57 treesize of output 49 [2022-12-13 20:15:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:15:05,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762150049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:05,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:05,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 17] total 37 [2022-12-13 20:15:05,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020080567] [2022-12-13 20:15:05,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:05,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:15:05,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:05,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:15:05,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1213, Unknown=1, NotChecked=0, Total=1332 [2022-12-13 20:15:05,801 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 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 20:15:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:07,485 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2022-12-13 20:15:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 20:15:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 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 37 [2022-12-13 20:15:07,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:07,486 INFO L225 Difference]: With dead ends: 127 [2022-12-13 20:15:07,486 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 20:15:07,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=825, Invalid=4874, Unknown=1, NotChecked=0, Total=5700 [2022-12-13 20:15:07,487 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 293 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:07,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 396 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:15:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 20:15:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-12-13 20:15:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 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 20:15:07,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-12-13 20:15:07,488 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 37 [2022-12-13 20:15:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:07,488 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-12-13 20:15:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 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 20:15:07,488 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-12-13 20:15:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:15:07,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:07,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:07,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:15:07,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:07,690 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:07,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:07,691 INFO L85 PathProgramCache]: Analyzing trace with hash -491067849, now seen corresponding path program 2 times [2022-12-13 20:15:07,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:07,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148326232] [2022-12-13 20:15:07,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:07,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:07,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148326232] [2022-12-13 20:15:07,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148326232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:07,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963391104] [2022-12-13 20:15:07,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:15:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:07,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:07,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:15:07,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:15:07,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 20:15:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:08,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:08,202 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 20:15:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:08,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963391104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:08,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:08,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-12-13 20:15:08,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063246877] [2022-12-13 20:15:08,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:15:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:15:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:15:08,246 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 20:15:08,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:08,458 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-12-13 20:15:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:15:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 45 [2022-12-13 20:15:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:08,458 INFO L225 Difference]: With dead ends: 67 [2022-12-13 20:15:08,458 INFO L226 Difference]: Without dead ends: 67 [2022-12-13 20:15:08,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-12-13 20:15:08,459 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 300 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:08,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 165 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:08,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-13 20:15:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-12-13 20:15:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 58 states have internal predecessors, (61), 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 20:15:08,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-12-13 20:15:08,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 45 [2022-12-13 20:15:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:08,461 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-12-13 20:15:08,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.35) internal successors, (87), 21 states have internal predecessors, (87), 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 20:15:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-12-13 20:15:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:15:08,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:08,461 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:08,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 20:15:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:08,662 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:08,663 INFO L85 PathProgramCache]: Analyzing trace with hash 530199960, now seen corresponding path program 2 times [2022-12-13 20:15:08,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:08,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929874896] [2022-12-13 20:15:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:08,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929874896] [2022-12-13 20:15:08,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929874896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:08,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293338520] [2022-12-13 20:15:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:15:08,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:08,972 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:08,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:15:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:15:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:09,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 20:15:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:09,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:09,322 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 20:15:09,354 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:09,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293338520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:09,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:09,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-12-13 20:15:09,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944860026] [2022-12-13 20:15:09,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:09,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:15:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:09,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:15:09,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:15:09,356 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 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 20:15:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:09,625 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-12-13 20:15:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:15:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 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 47 [2022-12-13 20:15:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:09,626 INFO L225 Difference]: With dead ends: 62 [2022-12-13 20:15:09,626 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 20:15:09,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:15:09,627 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:09,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 277 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 20:15:09,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-12-13 20:15:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 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 20:15:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-12-13 20:15:09,629 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 47 [2022-12-13 20:15:09,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:09,630 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-12-13 20:15:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 24 states have internal predecessors, (88), 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 20:15:09,630 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-12-13 20:15:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 20:15:09,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:09,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:09,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:15:09,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-13 20:15:09,832 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:09,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:09,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1243825766, now seen corresponding path program 2 times [2022-12-13 20:15:09,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:09,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871092995] [2022-12-13 20:15:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:09,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:10,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871092995] [2022-12-13 20:15:10,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871092995] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:10,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644929348] [2022-12-13 20:15:10,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:15:10,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:10,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:10,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:10,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:15:10,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 20:15:10,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:10,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:15:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 20:15:10,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:15:10,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644929348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:15:10,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:15:10,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2022-12-13 20:15:10,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069147561] [2022-12-13 20:15:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:15:10,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:15:10,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:15:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:15:10,223 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 20:15:10,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:10,263 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-12-13 20:15:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:15:10,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 51 [2022-12-13 20:15:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:10,264 INFO L225 Difference]: With dead ends: 60 [2022-12-13 20:15:10,264 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 20:15:10,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:15:10,264 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:10,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:15:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 20:15:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-13 20:15:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 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 20:15:10,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-12-13 20:15:10,266 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2022-12-13 20:15:10,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:10,267 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-12-13 20:15:10,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 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 20:15:10,267 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-12-13 20:15:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 20:15:10,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:10,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:10,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 20:15:10,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 20:15:10,468 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1019693383, now seen corresponding path program 3 times [2022-12-13 20:15:10,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362658746] [2022-12-13 20:15:10,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:10,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:10,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362658746] [2022-12-13 20:15:10,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362658746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:10,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454857197] [2022-12-13 20:15:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:15:10,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:10,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:10,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:10,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:15:10,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 20:15:10,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 20:15:10,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:11,052 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 14 treesize of output 10 [2022-12-13 20:15:11,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:15:11,592 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-13 20:15:11,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-12-13 20:15:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:11,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:11,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:11,875 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 99 treesize of output 99 [2022-12-13 20:15:11,888 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 30 treesize of output 26 [2022-12-13 20:15:11,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:11,897 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 45 treesize of output 37 [2022-12-13 20:15:12,226 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:15:12,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454857197] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:12,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:12,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 44 [2022-12-13 20:15:12,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264780853] [2022-12-13 20:15:12,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 20:15:12,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 20:15:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 20:15:12,228 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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 20:15:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:14,222 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2022-12-13 20:15:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-13 20:15:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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 53 [2022-12-13 20:15:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:14,223 INFO L225 Difference]: With dead ends: 166 [2022-12-13 20:15:14,223 INFO L226 Difference]: Without dead ends: 71 [2022-12-13 20:15:14,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=929, Invalid=7081, Unknown=0, NotChecked=0, Total=8010 [2022-12-13 20:15:14,224 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 384 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:14,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 515 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:15:14,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-13 20:15:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2022-12-13 20:15:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 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 20:15:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-12-13 20:15:14,226 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2022-12-13 20:15:14,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:14,226 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-12-13 20:15:14,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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 20:15:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-12-13 20:15:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-13 20:15:14,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:14,226 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:14,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:15:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 20:15:14,428 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:14,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2077042049, now seen corresponding path program 4 times [2022-12-13 20:15:14,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033844758] [2022-12-13 20:15:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:14,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:14,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:14,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033844758] [2022-12-13 20:15:14,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033844758] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:14,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659568644] [2022-12-13 20:15:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:15:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:14,640 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:14,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:15:14,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:15:14,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 20:15:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:14,983 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 20:15:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:15,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659568644] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:15,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:15,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-12-13 20:15:15,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369528171] [2022-12-13 20:15:15,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:15,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 20:15:15,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:15,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 20:15:15,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:15:15,027 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 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 20:15:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:15,227 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-12-13 20:15:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:15:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 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 61 [2022-12-13 20:15:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:15,228 INFO L225 Difference]: With dead ends: 75 [2022-12-13 20:15:15,228 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 20:15:15,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:15:15,228 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 282 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:15,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 258 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:15:15,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 20:15:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2022-12-13 20:15:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 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 20:15:15,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-12-13 20:15:15,230 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 61 [2022-12-13 20:15:15,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:15,230 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-12-13 20:15:15,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.625) internal successors, (111), 25 states have internal predecessors, (111), 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 20:15:15,230 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-12-13 20:15:15,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 20:15:15,230 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:15,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:15,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 20:15:15,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:15,432 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:15,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1122383840, now seen corresponding path program 3 times [2022-12-13 20:15:15,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082644971] [2022-12-13 20:15:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:15,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:15,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082644971] [2022-12-13 20:15:15,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082644971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:15,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683565440] [2022-12-13 20:15:15,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:15:15,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:15,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:15,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:15,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:15:15,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 20:15:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:15,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-13 20:15:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:16,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:16,330 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 7 treesize of output 5 [2022-12-13 20:15:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:16,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683565440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:16,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:16,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-12-13 20:15:16,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941616757] [2022-12-13 20:15:16,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:16,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:15:16,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:16,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:15:16,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:15:16,380 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 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 20:15:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:16,787 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2022-12-13 20:15:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:15:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 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 63 [2022-12-13 20:15:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:16,788 INFO L225 Difference]: With dead ends: 74 [2022-12-13 20:15:16,788 INFO L226 Difference]: Without dead ends: 74 [2022-12-13 20:15:16,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:15:16,789 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 178 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:16,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 327 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:15:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-12-13 20:15:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-12-13 20:15:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 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 20:15:16,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-12-13 20:15:16,790 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 63 [2022-12-13 20:15:16,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:16,790 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-12-13 20:15:16,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.387096774193548) internal successors, (136), 32 states have internal predecessors, (136), 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 20:15:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-12-13 20:15:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-13 20:15:16,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:16,791 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:16,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 20:15:16,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 20:15:16,992 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -356785407, now seen corresponding path program 5 times [2022-12-13 20:15:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:16,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071809922] [2022-12-13 20:15:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:16,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:17,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:17,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071809922] [2022-12-13 20:15:17,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071809922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:17,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474218339] [2022-12-13 20:15:17,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:15:17,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:17,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:17,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:17,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:15:17,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 20:15:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:17,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 108 conjunts are in the unsatisfiable core [2022-12-13 20:15:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:18,067 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 14 treesize of output 10 [2022-12-13 20:15:18,697 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:15:18,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:15:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:15:18,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:19,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:19,087 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 99 treesize of output 99 [2022-12-13 20:15:19,105 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 30 treesize of output 26 [2022-12-13 20:15:19,115 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:19,115 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 45 treesize of output 37 [2022-12-13 20:15:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:15:19,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474218339] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:19,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:19,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25, 21] total 55 [2022-12-13 20:15:19,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520432923] [2022-12-13 20:15:19,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:19,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-12-13 20:15:19,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:19,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-12-13 20:15:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 20:15:19,328 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 55 states have internal predecessors, (174), 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 20:15:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:21,873 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2022-12-13 20:15:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 20:15:21,874 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 55 states have internal predecessors, (174), 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 69 [2022-12-13 20:15:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:21,874 INFO L225 Difference]: With dead ends: 210 [2022-12-13 20:15:21,874 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 20:15:21,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1931 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1063, Invalid=10067, Unknown=0, NotChecked=0, Total=11130 [2022-12-13 20:15:21,876 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 570 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1528 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:21,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 760 Invalid, 1534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 20:15:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 20:15:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2022-12-13 20:15:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 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 20:15:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-12-13 20:15:21,878 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 69 [2022-12-13 20:15:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:21,878 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-12-13 20:15:21,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.1636363636363636) internal successors, (174), 55 states have internal predecessors, (174), 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 20:15:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-12-13 20:15:21,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:15:21,879 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:21,879 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:21,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 20:15:22,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 20:15:22,080 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:22,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1781179705, now seen corresponding path program 6 times [2022-12-13 20:15:22,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:22,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598685138] [2022-12-13 20:15:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 74 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:22,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:22,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598685138] [2022-12-13 20:15:22,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598685138] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:22,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118705964] [2022-12-13 20:15:22,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:15:22,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:22,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:22,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:22,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:15:22,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 20:15:22,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:22,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 82 conjunts are in the unsatisfiable core [2022-12-13 20:15:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:22,640 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 10 treesize of output 8 [2022-12-13 20:15:22,913 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 14 treesize of output 10 [2022-12-13 20:15:22,955 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 17 treesize of output 19 [2022-12-13 20:15:23,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:23,323 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 19 treesize of output 15 [2022-12-13 20:15:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:15:23,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:23,842 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 16 treesize of output 12 [2022-12-13 20:15:23,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:23,847 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 23 treesize of output 24 [2022-12-13 20:15:23,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:23,851 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 37 treesize of output 32 [2022-12-13 20:15:23,856 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 7 treesize of output 3 [2022-12-13 20:15:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-13 20:15:24,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118705964] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:24,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:24,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 14] total 43 [2022-12-13 20:15:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664836075] [2022-12-13 20:15:24,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 20:15:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 20:15:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1699, Unknown=1, NotChecked=0, Total=1892 [2022-12-13 20:15:24,141 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 44 states, 43 states have (on average 4.558139534883721) internal successors, (196), 44 states have internal predecessors, (196), 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 20:15:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:25,086 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-12-13 20:15:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:15:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.558139534883721) internal successors, (196), 44 states have internal predecessors, (196), 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 77 [2022-12-13 20:15:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:25,087 INFO L225 Difference]: With dead ends: 91 [2022-12-13 20:15:25,087 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 20:15:25,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=490, Invalid=2815, Unknown=1, NotChecked=0, Total=3306 [2022-12-13 20:15:25,088 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 289 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:25,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 574 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:15:25,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 20:15:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2022-12-13 20:15:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 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 20:15:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-12-13 20:15:25,089 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2022-12-13 20:15:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:25,089 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-12-13 20:15:25,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.558139534883721) internal successors, (196), 44 states have internal predecessors, (196), 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 20:15:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-12-13 20:15:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:15:25,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:25,090 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:25,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:15:25,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 20:15:25,291 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1978254888, now seen corresponding path program 4 times [2022-12-13 20:15:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:25,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280048929] [2022-12-13 20:15:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:25,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:25,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280048929] [2022-12-13 20:15:25,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280048929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859812473] [2022-12-13 20:15:25,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:15:25,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:25,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:25,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:15:25,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:15:25,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 20:15:25,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:25,846 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:15:25,847 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:15:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:26,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:26,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859812473] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:26,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-12-13 20:15:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082115683] [2022-12-13 20:15:26,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:26,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:15:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:15:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:15:26,340 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 37 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 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 20:15:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:26,773 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2022-12-13 20:15:26,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:15:26,773 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 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 79 [2022-12-13 20:15:26,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:26,774 INFO L225 Difference]: With dead ends: 90 [2022-12-13 20:15:26,774 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 20:15:26,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 20:15:26,774 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 508 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:26,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 348 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:15:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 20:15:26,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-12-13 20:15:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 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 20:15:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-12-13 20:15:26,777 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 79 [2022-12-13 20:15:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:26,777 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-12-13 20:15:26,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.305555555555555) internal successors, (155), 37 states have internal predecessors, (155), 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 20:15:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-12-13 20:15:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-13 20:15:26,778 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:26,778 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:26,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 20:15:26,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 20:15:26,979 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:26,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 622697289, now seen corresponding path program 7 times [2022-12-13 20:15:26,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:26,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034333700] [2022-12-13 20:15:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:26,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:27,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034333700] [2022-12-13 20:15:27,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034333700] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743282639] [2022-12-13 20:15:27,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:15:27,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:27,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:27,564 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:27,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 20:15:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:27,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 128 conjunts are in the unsatisfiable core [2022-12-13 20:15:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:27,980 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 14 treesize of output 10 [2022-12-13 20:15:28,773 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:15:28,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:15:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:15:28,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:29,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:29,443 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 99 treesize of output 99 [2022-12-13 20:15:29,459 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 30 treesize of output 26 [2022-12-13 20:15:29,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:29,471 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 45 treesize of output 37 [2022-12-13 20:15:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 13 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:15:29,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743282639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:29,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:29,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29, 24] total 64 [2022-12-13 20:15:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059861403] [2022-12-13 20:15:29,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 20:15:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 20:15:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=3826, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 20:15:29,792 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 64 states, 64 states have (on average 3.34375) internal successors, (214), 64 states have internal predecessors, (214), 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 20:15:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:33,162 INFO L93 Difference]: Finished difference Result 254 states and 257 transitions. [2022-12-13 20:15:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-12-13 20:15:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.34375) internal successors, (214), 64 states have internal predecessors, (214), 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 85 [2022-12-13 20:15:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:33,163 INFO L225 Difference]: With dead ends: 254 [2022-12-13 20:15:33,163 INFO L226 Difference]: Without dead ends: 103 [2022-12-13 20:15:33,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1213, Invalid=13793, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 20:15:33,165 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 744 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:33,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 1146 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 20:15:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-13 20:15:33,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2022-12-13 20:15:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 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 20:15:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-12-13 20:15:33,166 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 85 [2022-12-13 20:15:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:33,166 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-12-13 20:15:33,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.34375) internal successors, (214), 64 states have internal predecessors, (214), 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 20:15:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-12-13 20:15:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-13 20:15:33,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:33,167 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:33,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 20:15:33,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:33,368 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1086220047, now seen corresponding path program 8 times [2022-12-13 20:15:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:33,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317083523] [2022-12-13 20:15:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 15 proven. 115 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317083523] [2022-12-13 20:15:33,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317083523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577320980] [2022-12-13 20:15:33,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:15:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:33,724 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:33,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 20:15:33,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:15:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-13 20:15:33,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:34,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:34,239 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 20:15:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 28 proven. 102 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577320980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:34,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:34,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 32 [2022-12-13 20:15:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082143065] [2022-12-13 20:15:34,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 20:15:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 20:15:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:15:34,329 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 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 20:15:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:34,631 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-12-13 20:15:34,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:15:34,631 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 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 93 [2022-12-13 20:15:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:34,631 INFO L225 Difference]: With dead ends: 107 [2022-12-13 20:15:34,631 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 20:15:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 162 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=1452, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:15:34,632 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 465 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:34,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 416 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:15:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 20:15:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2022-12-13 20:15:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 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 20:15:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-12-13 20:15:34,633 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 93 [2022-12-13 20:15:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:34,634 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-12-13 20:15:34,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.96875) internal successors, (159), 33 states have internal predecessors, (159), 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 20:15:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-12-13 20:15:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-13 20:15:34,634 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:34,634 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:34,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 20:15:34,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-13 20:15:34,835 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash 180412528, now seen corresponding path program 5 times [2022-12-13 20:15:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258771187] [2022-12-13 20:15:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:34,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258771187] [2022-12-13 20:15:35,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258771187] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:35,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567133506] [2022-12-13 20:15:35,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:15:35,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:35,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:35,324 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:35,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 20:15:35,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 20:15:35,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 20:15:35,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:35,858 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:15:35,858 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:15:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:36,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:36,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567133506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:36,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:36,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-12-13 20:15:36,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076433684] [2022-12-13 20:15:36,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:36,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 20:15:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:36,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 20:15:36,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:15:36,659 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 42 states, 41 states have (on average 4.609756097560975) internal successors, (189), 42 states have internal predecessors, (189), 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 20:15:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:37,381 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-12-13 20:15:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 20:15:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.609756097560975) internal successors, (189), 42 states have internal predecessors, (189), 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 95 [2022-12-13 20:15:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:37,382 INFO L225 Difference]: With dead ends: 106 [2022-12-13 20:15:37,383 INFO L226 Difference]: Without dead ends: 106 [2022-12-13 20:15:37,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=2476, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:15:37,383 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 419 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:37,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 465 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:15:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-13 20:15:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-12-13 20:15:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 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 20:15:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-12-13 20:15:37,385 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2022-12-13 20:15:37,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:37,385 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-12-13 20:15:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.609756097560975) internal successors, (189), 42 states have internal predecessors, (189), 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 20:15:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-12-13 20:15:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-13 20:15:37,386 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:37,386 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:37,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 20:15:37,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:37,588 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1082531951, now seen corresponding path program 9 times [2022-12-13 20:15:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:37,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529041638] [2022-12-13 20:15:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:37,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:38,236 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:38,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529041638] [2022-12-13 20:15:38,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529041638] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:38,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98404026] [2022-12-13 20:15:38,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:15:38,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:38,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:38,238 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:38,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 20:15:38,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 20:15:38,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:38,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 130 conjunts are in the unsatisfiable core [2022-12-13 20:15:38,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:39,036 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 14 treesize of output 10 [2022-12-13 20:15:40,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:15:40,121 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-13 20:15:40,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-12-13 20:15:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:15:40,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:41,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:41,336 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 99 treesize of output 99 [2022-12-13 20:15:41,350 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 30 treesize of output 26 [2022-12-13 20:15:41,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:41,362 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 45 treesize of output 37 [2022-12-13 20:15:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 16 proven. 155 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 20:15:41,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98404026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:41,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:41,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 27] total 75 [2022-12-13 20:15:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51736654] [2022-12-13 20:15:41,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:41,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-12-13 20:15:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-12-13 20:15:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5335, Unknown=0, NotChecked=0, Total=5550 [2022-12-13 20:15:41,702 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 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 20:15:48,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:48,274 INFO L93 Difference]: Finished difference Result 298 states and 301 transitions. [2022-12-13 20:15:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 20:15:48,275 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 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 101 [2022-12-13 20:15:48,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:48,275 INFO L225 Difference]: With dead ends: 298 [2022-12-13 20:15:48,275 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 20:15:48,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3615 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1445, Invalid=20311, Unknown=0, NotChecked=0, Total=21756 [2022-12-13 20:15:48,277 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 937 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 4029 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 4039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:48,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1914 Invalid, 4039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4029 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 20:15:48,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 20:15:48,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-12-13 20:15:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 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 20:15:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-12-13 20:15:48,278 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 101 [2022-12-13 20:15:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:48,278 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-12-13 20:15:48,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.3866666666666667) internal successors, (254), 75 states have internal predecessors, (254), 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 20:15:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-12-13 20:15:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-13 20:15:48,279 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:48,279 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:48,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 20:15:48,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 20:15:48,480 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:48,482 INFO L85 PathProgramCache]: Analyzing trace with hash 705298263, now seen corresponding path program 10 times [2022-12-13 20:15:48,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:48,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308307134] [2022-12-13 20:15:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:48,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 28 proven. 164 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:48,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:48,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308307134] [2022-12-13 20:15:48,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308307134] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:48,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642082781] [2022-12-13 20:15:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:15:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:48,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:48,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:48,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 20:15:49,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:15:49,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 20:15:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:49,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:49,655 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 20:15:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642082781] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:49,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:49,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2022-12-13 20:15:49,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929229081] [2022-12-13 20:15:49,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:49,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:15:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:49,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:15:49,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:15:49,751 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 37 states, 36 states have (on average 5.083333333333333) internal successors, (183), 37 states have internal predecessors, (183), 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 20:15:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:50,211 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2022-12-13 20:15:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 20:15:50,211 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 5.083333333333333) internal successors, (183), 37 states have internal predecessors, (183), 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 109 [2022-12-13 20:15:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:50,212 INFO L225 Difference]: With dead ends: 123 [2022-12-13 20:15:50,212 INFO L226 Difference]: Without dead ends: 123 [2022-12-13 20:15:50,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=1821, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 20:15:50,212 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 444 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:50,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 588 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:15:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-13 20:15:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2022-12-13 20:15:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 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 20:15:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-12-13 20:15:50,214 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 109 [2022-12-13 20:15:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:50,215 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-12-13 20:15:50,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 5.083333333333333) internal successors, (183), 37 states have internal predecessors, (183), 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 20:15:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-12-13 20:15:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-13 20:15:50,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:50,216 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:50,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 20:15:50,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:50,417 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -813201736, now seen corresponding path program 6 times [2022-12-13 20:15:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:50,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400918009] [2022-12-13 20:15:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 28 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:51,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400918009] [2022-12-13 20:15:51,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400918009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:51,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434377164] [2022-12-13 20:15:51,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:15:51,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:51,127 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:51,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 20:15:51,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-12-13 20:15:51,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:51,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 20:15:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:51,668 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:15:51,669 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:15:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:52,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 45 proven. 159 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:52,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434377164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:52,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:52,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2022-12-13 20:15:52,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263634908] [2022-12-13 20:15:52,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:52,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-13 20:15:52,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:52,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-13 20:15:52,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2507, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 20:15:52,615 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 54 states, 53 states have (on average 4.886792452830188) internal successors, (259), 54 states have internal predecessors, (259), 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 20:15:53,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:15:53,475 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2022-12-13 20:15:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 20:15:53,476 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.886792452830188) internal successors, (259), 54 states have internal predecessors, (259), 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 111 [2022-12-13 20:15:53,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:15:53,477 INFO L225 Difference]: With dead ends: 122 [2022-12-13 20:15:53,477 INFO L226 Difference]: Without dead ends: 122 [2022-12-13 20:15:53,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=983, Invalid=3987, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 20:15:53,478 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 746 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:15:53,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 487 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:15:53,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-12-13 20:15:53,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-12-13 20:15:53,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 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 20:15:53,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-12-13 20:15:53,480 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 111 [2022-12-13 20:15:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:15:53,480 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-12-13 20:15:53,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.886792452830188) internal successors, (259), 54 states have internal predecessors, (259), 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 20:15:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-12-13 20:15:53,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-13 20:15:53,481 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:15:53,481 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:15:53,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 20:15:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:53,682 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:15:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:15:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2098417703, now seen corresponding path program 11 times [2022-12-13 20:15:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:15:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552462419] [2022-12-13 20:15:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:15:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:15:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:15:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:54,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:15:54,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552462419] [2022-12-13 20:15:54,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552462419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:15:54,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287747148] [2022-12-13 20:15:54,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:15:54,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:15:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:15:54,532 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:15:54,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 20:15:55,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 20:15:55,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:15:55,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 176 conjunts are in the unsatisfiable core [2022-12-13 20:15:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:15:56,261 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 14 treesize of output 10 [2022-12-13 20:15:56,312 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-12-13 20:15:56,312 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 25 treesize of output 24 [2022-12-13 20:15:57,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:15:57,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:57,826 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 17 treesize of output 10 [2022-12-13 20:15:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:15:57,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:15:58,886 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:15:58,886 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 80 treesize of output 80 [2022-12-13 20:15:58,893 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 18 treesize of output 14 [2022-12-13 20:15:58,899 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 16 treesize of output 12 [2022-12-13 20:15:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:15:59,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287747148] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:15:59,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:15:59,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37, 30] total 82 [2022-12-13 20:15:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919888099] [2022-12-13 20:15:59,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:15:59,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-12-13 20:15:59,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:15:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-12-13 20:15:59,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=6345, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 20:15:59,444 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 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 20:16:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:16:03,525 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2022-12-13 20:16:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 20:16:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 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 117 [2022-12-13 20:16:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:16:03,526 INFO L225 Difference]: With dead ends: 215 [2022-12-13 20:16:03,526 INFO L226 Difference]: Without dead ends: 128 [2022-12-13 20:16:03,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=903, Invalid=14103, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 20:16:03,527 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 431 mSDsluCounter, 1557 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:16:03,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 1597 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 20:16:03,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-12-13 20:16:03,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-12-13 20:16:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 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 20:16:03,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-12-13 20:16:03,528 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 117 [2022-12-13 20:16:03,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:16:03,528 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-12-13 20:16:03,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.5853658536585367) internal successors, (294), 82 states have internal predecessors, (294), 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 20:16:03,529 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-12-13 20:16:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-13 20:16:03,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:16:03,529 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:16:03,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 20:16:03,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 20:16:03,730 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:16:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:16:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2037687516, now seen corresponding path program 12 times [2022-12-13 20:16:03,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:16:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004066316] [2022-12-13 20:16:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:16:03,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:16:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:16:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 45 proven. 221 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:16:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:16:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004066316] [2022-12-13 20:16:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004066316] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:16:04,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870442134] [2022-12-13 20:16:04,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:16:04,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:16:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:16:04,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:16:04,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 20:16:04,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-12-13 20:16:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:16:04,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 20:16:04,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:16:05,129 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 14 treesize of output 10 [2022-12-13 20:16:05,858 INFO L321 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2022-12-13 20:16:05,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:16:05,889 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:16:05,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:07,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:07,102 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 99 treesize of output 99 [2022-12-13 20:23:07,116 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 30 treesize of output 26 [2022-12-13 20:23:07,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:07,126 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 45 treesize of output 39 [2022-12-13 20:23:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 19 proven. 222 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870442134] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:07,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:07,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 25] total 57 [2022-12-13 20:23:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535926035] [2022-12-13 20:23:07,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:07,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 20:23:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 20:23:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2820, Unknown=219, NotChecked=0, Total=3192 [2022-12-13 20:23:07,280 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 57 states, 57 states have (on average 4.473684210526316) internal successors, (255), 57 states have internal predecessors, (255), 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 20:23:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:10,633 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2022-12-13 20:23:10,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-13 20:23:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.473684210526316) internal successors, (255), 57 states have internal predecessors, (255), 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 121 [2022-12-13 20:23:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:10,634 INFO L225 Difference]: With dead ends: 200 [2022-12-13 20:23:10,634 INFO L226 Difference]: Without dead ends: 142 [2022-12-13 20:23:10,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 424.1s TimeCoverageRelationStatistics Valid=1054, Invalid=9439, Unknown=219, NotChecked=0, Total=10712 [2022-12-13 20:23:10,635 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1351 mSDsluCounter, 1321 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 2925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:10,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1363 Invalid, 2925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 20:23:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-13 20:23:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2022-12-13 20:23:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 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 20:23:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2022-12-13 20:23:10,636 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 121 [2022-12-13 20:23:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:10,636 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2022-12-13 20:23:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.473684210526316) internal successors, (255), 57 states have internal predecessors, (255), 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 20:23:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2022-12-13 20:23:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-13 20:23:10,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:10,637 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:10,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 20:23:10,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 20:23:10,838 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:10,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 240761088, now seen corresponding path program 7 times [2022-12-13 20:23:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:10,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160293308] [2022-12-13 20:23:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:10,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 45 proven. 235 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:11,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160293308] [2022-12-13 20:23:11,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160293308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:11,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296012236] [2022-12-13 20:23:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:23:11,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:11,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:11,459 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:11,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 20:23:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:11,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 20:23:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:11,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:12,241 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 20:23:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 66 proven. 214 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:12,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296012236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:12,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:12,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2022-12-13 20:23:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274206805] [2022-12-13 20:23:12,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:12,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 20:23:12,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:12,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 20:23:12,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1678, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 20:23:12,363 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 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 20:23:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:13,013 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2022-12-13 20:23:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:23:13,014 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 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 127 [2022-12-13 20:23:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:13,014 INFO L225 Difference]: With dead ends: 138 [2022-12-13 20:23:13,014 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 20:23:13,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 223 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=755, Invalid=3151, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 20:23:13,015 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 603 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:13,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 665 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:23:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 20:23:13,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-12-13 20:23:13,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 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 20:23:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2022-12-13 20:23:13,018 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 127 [2022-12-13 20:23:13,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:13,018 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2022-12-13 20:23:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.837209302325581) internal successors, (208), 44 states have internal predecessors, (208), 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 20:23:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2022-12-13 20:23:13,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-12-13 20:23:13,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:13,019 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:13,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 20:23:13,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 20:23:13,220 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:13,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1265497055, now seen corresponding path program 13 times [2022-12-13 20:23:13,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:13,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456168694] [2022-12-13 20:23:13,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:13,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:14,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:14,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456168694] [2022-12-13 20:23:14,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456168694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:14,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678652550] [2022-12-13 20:23:14,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:23:14,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:14,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:14,223 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:14,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 20:23:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:14,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 190 conjunts are in the unsatisfiable core [2022-12-13 20:23:14,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:14,787 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 14 treesize of output 10 [2022-12-13 20:23:16,232 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:23:16,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:23:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:23:16,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:17,301 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:17,302 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 99 treesize of output 99 [2022-12-13 20:23:17,307 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 30 treesize of output 26 [2022-12-13 20:23:17,323 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:17,323 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 45 treesize of output 37 [2022-12-13 20:23:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 22 proven. 301 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:17,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678652550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:17,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:17,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41, 33] total 91 [2022-12-13 20:23:17,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402386759] [2022-12-13 20:23:17,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:17,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-13 20:23:17,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:17,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-13 20:23:17,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=7896, Unknown=0, NotChecked=0, Total=8190 [2022-12-13 20:23:17,818 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 91 states, 91 states have (on average 3.67032967032967) internal successors, (334), 91 states have internal predecessors, (334), 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 20:23:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:25,096 INFO L93 Difference]: Finished difference Result 386 states and 389 transitions. [2022-12-13 20:23:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-12-13 20:23:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.67032967032967) internal successors, (334), 91 states have internal predecessors, (334), 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 133 [2022-12-13 20:23:25,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:25,097 INFO L225 Difference]: With dead ends: 386 [2022-12-13 20:23:25,097 INFO L226 Difference]: Without dead ends: 151 [2022-12-13 20:23:25,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5131 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1707, Invalid=28395, Unknown=0, NotChecked=0, Total=30102 [2022-12-13 20:23:25,099 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 955 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 5114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:25,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 2420 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5114 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 20:23:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-13 20:23:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2022-12-13 20:23:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 143 states have (on average 1.027972027972028) internal successors, (147), 144 states have internal predecessors, (147), 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 20:23:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-12-13 20:23:25,101 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 133 [2022-12-13 20:23:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:25,101 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-12-13 20:23:25,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.67032967032967) internal successors, (334), 91 states have internal predecessors, (334), 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 20:23:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-12-13 20:23:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-13 20:23:25,102 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:25,102 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:25,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 20:23:25,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 20:23:25,304 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:25,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1204235289, now seen corresponding path program 14 times [2022-12-13 20:23:25,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:25,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587084713] [2022-12-13 20:23:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:25,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 66 proven. 286 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:25,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587084713] [2022-12-13 20:23:25,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587084713] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:25,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582220489] [2022-12-13 20:23:25,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:23:25,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:25,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:25,961 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:25,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 20:23:26,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:23:26,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 20:23:26,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:26,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:26,795 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 20:23:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 91 proven. 261 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:26,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582220489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:26,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:26,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 44 [2022-12-13 20:23:26,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79487199] [2022-12-13 20:23:26,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:26,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 20:23:26,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:26,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 20:23:26,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 20:23:26,946 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 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 20:23:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:27,710 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2022-12-13 20:23:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 20:23:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 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 141 [2022-12-13 20:23:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:27,711 INFO L225 Difference]: With dead ends: 155 [2022-12-13 20:23:27,711 INFO L226 Difference]: Without dead ends: 155 [2022-12-13 20:23:27,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 249 SyntacticMatches, 9 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 20:23:27,712 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 617 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:27,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 822 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:23:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-13 20:23:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2022-12-13 20:23:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 150 states have internal predecessors, (153), 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 20:23:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-12-13 20:23:27,713 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 141 [2022-12-13 20:23:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:27,714 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-12-13 20:23:27,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 5.25) internal successors, (231), 45 states have internal predecessors, (231), 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 20:23:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-12-13 20:23:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-13 20:23:27,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:27,714 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:27,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 20:23:27,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:27,915 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:27,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1923909816, now seen corresponding path program 8 times [2022-12-13 20:23:27,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:27,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684999625] [2022-12-13 20:23:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:27,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 66 proven. 302 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:28,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:28,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684999625] [2022-12-13 20:23:28,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684999625] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:28,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391478975] [2022-12-13 20:23:28,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:23:28,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:28,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:28,695 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:28,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 20:23:28,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:23:28,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:28,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2022-12-13 20:23:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:28,862 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:23:28,862 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:23:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:29,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 91 proven. 277 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:29,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391478975] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:29,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:29,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2022-12-13 20:23:29,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744715529] [2022-12-13 20:23:29,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:29,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 20:23:29,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 20:23:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2818, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:23:29,744 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 57 states have internal predecessors, (267), 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 20:23:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:30,505 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2022-12-13 20:23:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 20:23:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 57 states have internal predecessors, (267), 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 143 [2022-12-13 20:23:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:30,506 INFO L225 Difference]: With dead ends: 154 [2022-12-13 20:23:30,506 INFO L226 Difference]: Without dead ends: 154 [2022-12-13 20:23:30,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1214, Invalid=4792, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:23:30,507 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 419 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:30,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 795 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:23:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-13 20:23:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-12-13 20:23:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 152 states have internal predecessors, (155), 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 20:23:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2022-12-13 20:23:30,510 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 143 [2022-12-13 20:23:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:30,510 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2022-12-13 20:23:30,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 4.767857142857143) internal successors, (267), 57 states have internal predecessors, (267), 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 20:23:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2022-12-13 20:23:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-13 20:23:30,511 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:30,511 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:30,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:30,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:30,712 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:30,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash 361100393, now seen corresponding path program 15 times [2022-12-13 20:23:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:30,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619247860] [2022-12-13 20:23:30,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:30,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:31,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619247860] [2022-12-13 20:23:31,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619247860] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:31,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440530116] [2022-12-13 20:23:31,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:23:31,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:31,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:31,750 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 20:23:33,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 20:23:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:33,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 172 conjunts are in the unsatisfiable core [2022-12-13 20:23:33,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:34,444 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 14 treesize of output 10 [2022-12-13 20:23:34,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:23:34,504 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-12-13 20:23:34,504 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 25 treesize of output 24 [2022-12-13 20:23:36,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:23:36,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:36,173 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 17 treesize of output 10 [2022-12-13 20:23:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:23:36,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:36,454 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 15 treesize of output 13 [2022-12-13 20:23:36,455 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 16 treesize of output 12 [2022-12-13 20:23:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 25 proven. 421 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-13 20:23:37,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440530116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:37,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:37,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 46, 27] total 84 [2022-12-13 20:23:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685715470] [2022-12-13 20:23:37,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:37,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-13 20:23:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-13 20:23:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=6670, Unknown=0, NotChecked=0, Total=6972 [2022-12-13 20:23:37,092 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand has 84 states, 84 states have (on average 3.75) internal successors, (315), 84 states have internal predecessors, (315), 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 20:23:43,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:43,814 INFO L93 Difference]: Finished difference Result 349 states and 352 transitions. [2022-12-13 20:23:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 20:23:43,814 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.75) internal successors, (315), 84 states have internal predecessors, (315), 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 149 [2022-12-13 20:23:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:43,815 INFO L225 Difference]: With dead ends: 349 [2022-12-13 20:23:43,815 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 20:23:43,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5385 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1581, Invalid=22911, Unknown=0, NotChecked=0, Total=24492 [2022-12-13 20:23:43,816 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1294 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 5146 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 2417 SdHoareTripleChecker+Invalid, 5158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 5146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:43,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 2417 Invalid, 5158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 5146 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-13 20:23:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 20:23:43,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2022-12-13 20:23:43,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 156 states have internal predecessors, (159), 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 20:23:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-12-13 20:23:43,818 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2022-12-13 20:23:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:43,818 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-12-13 20:23:43,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.75) internal successors, (315), 84 states have internal predecessors, (315), 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 20:23:43,818 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-12-13 20:23:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-13 20:23:43,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:43,819 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:43,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:44,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-13 20:23:44,021 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:44,022 INFO L85 PathProgramCache]: Analyzing trace with hash 545332588, now seen corresponding path program 16 times [2022-12-13 20:23:44,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284601923] [2022-12-13 20:23:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:44,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:44,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:44,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:44,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284601923] [2022-12-13 20:23:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284601923] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:44,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554088252] [2022-12-13 20:23:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:23:44,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:44,836 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:44,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 20:23:45,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:23:45,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-13 20:23:45,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:45,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:46,053 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 22 treesize of output 18 [2022-12-13 20:23:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-12-13 20:23:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554088252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:46,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:46,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 56 [2022-12-13 20:23:46,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119260884] [2022-12-13 20:23:46,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:46,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 20:23:46,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:46,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 20:23:46,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2764, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:23:46,359 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 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 20:23:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:46,984 INFO L93 Difference]: Finished difference Result 167 states and 169 transitions. [2022-12-13 20:23:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:23:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 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 153 [2022-12-13 20:23:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:46,985 INFO L225 Difference]: With dead ends: 167 [2022-12-13 20:23:46,985 INFO L226 Difference]: Without dead ends: 167 [2022-12-13 20:23:46,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1016, Invalid=3954, Unknown=0, NotChecked=0, Total=4970 [2022-12-13 20:23:46,985 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 579 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:46,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 876 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:23:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-13 20:23:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2022-12-13 20:23:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 162 states have internal predecessors, (165), 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 20:23:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-12-13 20:23:46,988 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 153 [2022-12-13 20:23:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:46,988 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-12-13 20:23:46,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.339285714285714) internal successors, (299), 57 states have internal predecessors, (299), 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 20:23:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-12-13 20:23:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-13 20:23:46,989 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:46,989 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:46,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:47,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:47,190 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash 78607245, now seen corresponding path program 9 times [2022-12-13 20:23:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:47,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209022736] [2022-12-13 20:23:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:47,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:23:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209022736] [2022-12-13 20:23:48,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209022736] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:48,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861139420] [2022-12-13 20:23:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:23:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:48,721 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:48,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 20:23:50,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-12-13 20:23:50,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 191 conjunts are in the unsatisfiable core [2022-12-13 20:23:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:51,094 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 14 treesize of output 10 [2022-12-13 20:23:52,684 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:23:52,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:23:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 392 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:23:52,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:53,803 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:53,803 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 99 treesize of output 99 [2022-12-13 20:23:53,816 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 30 treesize of output 26 [2022-12-13 20:23:53,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:23:53,825 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 45 treesize of output 37 [2022-12-13 20:23:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 43 proven. 392 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:23:54,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861139420] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:54,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:54,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 36] total 105 [2022-12-13 20:23:54,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472028525] [2022-12-13 20:23:54,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:54,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-12-13 20:23:54,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:54,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-12-13 20:23:54,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=10530, Unknown=0, NotChecked=0, Total=10920 [2022-12-13 20:23:54,329 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 105 states, 105 states have (on average 3.619047619047619) internal successors, (380), 105 states have internal predecessors, (380), 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 20:23:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:58,991 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-12-13 20:23:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 20:23:58,992 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.619047619047619) internal successors, (380), 105 states have internal predecessors, (380), 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 155 [2022-12-13 20:23:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:58,992 INFO L225 Difference]: With dead ends: 247 [2022-12-13 20:23:58,992 INFO L226 Difference]: Without dead ends: 173 [2022-12-13 20:23:58,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5146 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1250, Invalid=19920, Unknown=0, NotChecked=0, Total=21170 [2022-12-13 20:23:58,993 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 906 mSDsluCounter, 3076 mSDsCounter, 0 mSdLazyCounter, 6670 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 6693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:58,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 3128 Invalid, 6693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6670 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 20:23:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-13 20:23:58,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2022-12-13 20:23:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 166 states have internal predecessors, (169), 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 20:23:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-12-13 20:23:58,995 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 155 [2022-12-13 20:23:58,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:58,995 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-12-13 20:23:58,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.619047619047619) internal successors, (380), 105 states have internal predecessors, (380), 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 20:23:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-12-13 20:23:58,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-13 20:23:58,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:58,996 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:59,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:59,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:59,197 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:23:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1903115888, now seen corresponding path program 10 times [2022-12-13 20:23:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:59,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754121872] [2022-12-13 20:23:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:59,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 91 proven. 377 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:24:00,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754121872] [2022-12-13 20:24:00,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754121872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130244354] [2022-12-13 20:24:00,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:24:00,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:00,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:00,033 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:00,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 20:24:00,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:24:00,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:00,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-13 20:24:00,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:00,468 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:24:00,468 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:24:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:24:00,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:01,743 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 120 proven. 348 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:24:01,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130244354] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:01,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:01,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 61 [2022-12-13 20:24:01,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062408448] [2022-12-13 20:24:01,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:01,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 20:24:01,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:01,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 20:24:01,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3254, Unknown=0, NotChecked=0, Total=3782 [2022-12-13 20:24:01,744 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 62 states, 61 states have (on average 4.934426229508197) internal successors, (301), 62 states have internal predecessors, (301), 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 20:24:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:02,549 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-12-13 20:24:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 20:24:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.934426229508197) internal successors, (301), 62 states have internal predecessors, (301), 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 159 [2022-12-13 20:24:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:02,550 INFO L225 Difference]: With dead ends: 170 [2022-12-13 20:24:02,550 INFO L226 Difference]: Without dead ends: 170 [2022-12-13 20:24:02,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1571, Invalid=5569, Unknown=0, NotChecked=0, Total=7140 [2022-12-13 20:24:02,551 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 645 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:02,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 951 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:24:02,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-13 20:24:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-12-13 20:24:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 168 states have internal predecessors, (171), 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 20:24:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2022-12-13 20:24:02,553 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 159 [2022-12-13 20:24:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:02,553 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2022-12-13 20:24:02,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.934426229508197) internal successors, (301), 62 states have internal predecessors, (301), 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 20:24:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2022-12-13 20:24:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-12-13 20:24:02,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:02,555 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:02,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 20:24:02,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 20:24:02,756 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:02,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:02,757 INFO L85 PathProgramCache]: Analyzing trace with hash -488347471, now seen corresponding path program 17 times [2022-12-13 20:24:02,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:02,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692715062] [2022-12-13 20:24:02,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:02,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:24:03,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:03,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692715062] [2022-12-13 20:24:03,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692715062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:03,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722751606] [2022-12-13 20:24:03,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:24:03,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:03,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:03,919 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:03,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 20:24:05,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 20:24:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 228 conjunts are in the unsatisfiable core [2022-12-13 20:24:05,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:06,511 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 14 treesize of output 10 [2022-12-13 20:24:08,245 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:24:08,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:24:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:24:08,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:09,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:24:09,854 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 99 treesize of output 99 [2022-12-13 20:24:09,866 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 30 treesize of output 26 [2022-12-13 20:24:09,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:24:09,873 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 45 treesize of output 37 [2022-12-13 20:24:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 28 proven. 495 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-12-13 20:24:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722751606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:10,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:10,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 49, 39] total 109 [2022-12-13 20:24:10,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109497193] [2022-12-13 20:24:10,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:10,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-12-13 20:24:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-12-13 20:24:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=11421, Unknown=0, NotChecked=0, Total=11772 [2022-12-13 20:24:10,553 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand has 109 states, 109 states have (on average 3.7981651376146788) internal successors, (414), 109 states have internal predecessors, (414), 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 20:24:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:21,354 INFO L93 Difference]: Finished difference Result 474 states and 477 transitions. [2022-12-13 20:24:21,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-13 20:24:21,354 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 3.7981651376146788) internal successors, (414), 109 states have internal predecessors, (414), 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 165 [2022-12-13 20:24:21,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:21,355 INFO L225 Difference]: With dead ends: 474 [2022-12-13 20:24:21,355 INFO L226 Difference]: Without dead ends: 183 [2022-12-13 20:24:21,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7307 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=2013, Invalid=41043, Unknown=0, NotChecked=0, Total=43056 [2022-12-13 20:24:21,356 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1253 mSDsluCounter, 3759 mSDsCounter, 0 mSdLazyCounter, 8159 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1253 SdHoareTripleChecker+Valid, 3813 SdHoareTripleChecker+Invalid, 8177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 8159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:21,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1253 Valid, 3813 Invalid, 8177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 8159 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-13 20:24:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-13 20:24:21,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 177. [2022-12-13 20:24:21,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 175 states have (on average 1.022857142857143) internal successors, (179), 176 states have internal predecessors, (179), 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 20:24:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2022-12-13 20:24:21,358 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 165 [2022-12-13 20:24:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:21,358 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2022-12-13 20:24:21,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 3.7981651376146788) internal successors, (414), 109 states have internal predecessors, (414), 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 20:24:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2022-12-13 20:24:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-13 20:24:21,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:21,359 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:21,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 20:24:21,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 20:24:21,559 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash 423745655, now seen corresponding path program 18 times [2022-12-13 20:24:21,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:21,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106392793] [2022-12-13 20:24:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 120 proven. 440 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:22,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106392793] [2022-12-13 20:24:22,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106392793] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:22,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145052764] [2022-12-13 20:24:22,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:24:22,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:22,409 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:22,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 20:24:24,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-12-13 20:24:24,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:24,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 20:24:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:24,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:25,112 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 7 treesize of output 5 [2022-12-13 20:24:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 153 proven. 407 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145052764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:25,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 62 [2022-12-13 20:24:25,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152400240] [2022-12-13 20:24:25,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:25,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 20:24:25,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:25,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 20:24:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=3330, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 20:24:25,293 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 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 20:24:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:26,042 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2022-12-13 20:24:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 20:24:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 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 173 [2022-12-13 20:24:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:26,043 INFO L225 Difference]: With dead ends: 187 [2022-12-13 20:24:26,043 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 20:24:26,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 297 SyntacticMatches, 11 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1569, Invalid=5913, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 20:24:26,043 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 532 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:26,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 721 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:24:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 20:24:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2022-12-13 20:24:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 181 states have (on average 1.022099447513812) internal successors, (185), 182 states have internal predecessors, (185), 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 20:24:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2022-12-13 20:24:26,045 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 173 [2022-12-13 20:24:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:26,045 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2022-12-13 20:24:26,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 5.725806451612903) internal successors, (355), 63 states have internal predecessors, (355), 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 20:24:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2022-12-13 20:24:26,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-12-13 20:24:26,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:26,046 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:26,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 20:24:26,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 20:24:26,247 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:26,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:26,248 INFO L85 PathProgramCache]: Analyzing trace with hash -802318376, now seen corresponding path program 11 times [2022-12-13 20:24:26,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:26,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620169873] [2022-12-13 20:24:26,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:26,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 120 proven. 460 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:27,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620169873] [2022-12-13 20:24:27,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620169873] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:27,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160984102] [2022-12-13 20:24:27,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:24:27,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:27,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:27,331 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:27,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 20:24:28,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-12-13 20:24:28,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 20:24:28,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:28,737 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:24:28,737 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:24:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 120 proven. 460 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:29,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 136 proven. 444 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:30,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160984102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:30,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:30,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 66 [2022-12-13 20:24:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100132762] [2022-12-13 20:24:30,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-13 20:24:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-13 20:24:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=3873, Unknown=0, NotChecked=0, Total=4422 [2022-12-13 20:24:30,305 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 67 states, 66 states have (on average 4.893939393939394) internal successors, (323), 67 states have internal predecessors, (323), 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 20:24:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:31,519 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2022-12-13 20:24:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 20:24:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 4.893939393939394) internal successors, (323), 67 states have internal predecessors, (323), 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 175 [2022-12-13 20:24:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:31,520 INFO L225 Difference]: With dead ends: 186 [2022-12-13 20:24:31,520 INFO L226 Difference]: Without dead ends: 186 [2022-12-13 20:24:31,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1704, Invalid=6852, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 20:24:31,520 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 908 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:31,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1215 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1733 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:24:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-12-13 20:24:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-12-13 20:24:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 184 states have internal predecessors, (187), 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 20:24:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2022-12-13 20:24:31,522 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 175 [2022-12-13 20:24:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:31,522 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2022-12-13 20:24:31,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 4.893939393939394) internal successors, (323), 67 states have internal predecessors, (323), 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 20:24:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2022-12-13 20:24:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-13 20:24:31,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:31,523 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:31,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 20:24:31,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 20:24:31,724 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -708220679, now seen corresponding path program 19 times [2022-12-13 20:24:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:31,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690891921] [2022-12-13 20:24:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:31,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690891921] [2022-12-13 20:24:33,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690891921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:33,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347879394] [2022-12-13 20:24:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:24:33,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:33,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:33,060 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:33,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 20:24:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:33,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 250 conjunts are in the unsatisfiable core [2022-12-13 20:24:33,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:34,135 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 14 treesize of output 10 [2022-12-13 20:24:36,368 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:24:36,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:24:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:24:36,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:38,358 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:24:38,358 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 99 treesize of output 99 [2022-12-13 20:24:38,371 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 30 treesize of output 26 [2022-12-13 20:24:38,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:24:38,380 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 45 treesize of output 37 [2022-12-13 20:24:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 831 backedges. 31 proven. 610 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-13 20:24:39,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347879394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:39,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:39,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 53, 42] total 118 [2022-12-13 20:24:39,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848251850] [2022-12-13 20:24:39,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:39,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-12-13 20:24:39,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:39,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-12-13 20:24:39,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=13425, Unknown=0, NotChecked=0, Total=13806 [2022-12-13 20:24:39,241 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 118 states, 118 states have (on average 3.847457627118644) internal successors, (454), 118 states have internal predecessors, (454), 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 20:24:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:50,976 INFO L93 Difference]: Finished difference Result 518 states and 521 transitions. [2022-12-13 20:24:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-12-13 20:24:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.847457627118644) internal successors, (454), 118 states have internal predecessors, (454), 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 181 [2022-12-13 20:24:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:50,977 INFO L225 Difference]: With dead ends: 518 [2022-12-13 20:24:50,977 INFO L226 Difference]: Without dead ends: 199 [2022-12-13 20:24:50,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8539 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=2190, Invalid=48210, Unknown=0, NotChecked=0, Total=50400 [2022-12-13 20:24:50,982 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1473 mSDsluCounter, 4450 mSDsCounter, 0 mSdLazyCounter, 9646 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1473 SdHoareTripleChecker+Valid, 4509 SdHoareTripleChecker+Invalid, 9666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 9646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:50,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1473 Valid, 4509 Invalid, 9666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 9646 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-13 20:24:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-12-13 20:24:50,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2022-12-13 20:24:50,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 192 states have internal predecessors, (195), 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 20:24:50,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2022-12-13 20:24:50,984 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 181 [2022-12-13 20:24:50,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:50,985 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2022-12-13 20:24:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.847457627118644) internal successors, (454), 118 states have internal predecessors, (454), 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 20:24:50,985 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2022-12-13 20:24:50,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-12-13 20:24:50,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:50,985 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:50,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-13 20:24:51,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:51,187 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash -618779457, now seen corresponding path program 20 times [2022-12-13 20:24:51,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:51,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490508421] [2022-12-13 20:24:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:51,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 153 proven. 529 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:24:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490508421] [2022-12-13 20:24:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490508421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798105384] [2022-12-13 20:24:52,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:24:52,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:52,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:52,235 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:52,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 20:24:52,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:24:52,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:52,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 110 conjunts are in the unsatisfiable core [2022-12-13 20:24:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:24:52,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:24:53,472 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 20:24:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 913 backedges. 190 proven. 492 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:24:53,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798105384] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:24:53,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:24:53,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 56 [2022-12-13 20:24:53,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959075280] [2022-12-13 20:24:53,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:24:53,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 20:24:53,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:24:53,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 20:24:53,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2814, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:24:53,738 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 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 20:24:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:24:54,783 INFO L93 Difference]: Finished difference Result 203 states and 205 transitions. [2022-12-13 20:24:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:24:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 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 189 [2022-12-13 20:24:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:24:54,784 INFO L225 Difference]: With dead ends: 203 [2022-12-13 20:24:54,784 INFO L226 Difference]: Without dead ends: 203 [2022-12-13 20:24:54,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 336 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=975, Invalid=4281, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 20:24:54,785 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 677 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:24:54,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1208 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:24:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-13 20:24:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2022-12-13 20:24:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 197 states have (on average 1.0203045685279188) internal successors, (201), 198 states have internal predecessors, (201), 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 20:24:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2022-12-13 20:24:54,786 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 189 [2022-12-13 20:24:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:24:54,787 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2022-12-13 20:24:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 5.410714285714286) internal successors, (303), 57 states have internal predecessors, (303), 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 20:24:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2022-12-13 20:24:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-12-13 20:24:54,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:24:54,787 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:24:54,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 20:24:54,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:54,989 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:24:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:24:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1941571040, now seen corresponding path program 12 times [2022-12-13 20:24:54,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:24:54,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639116967] [2022-12-13 20:24:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:24:54,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:24:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:24:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 153 proven. 551 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:24:56,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:24:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639116967] [2022-12-13 20:24:56,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639116967] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:24:56,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844447000] [2022-12-13 20:24:56,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:24:56,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:24:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:24:56,200 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:24:56,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 20:24:59,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-12-13 20:24:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:24:59,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 95 conjunts are in the unsatisfiable core [2022-12-13 20:24:59,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:24:59,246 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 20:24:59,246 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-13 20:25:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 190 proven. 514 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:25:00,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:25:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 190 proven. 514 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:25:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844447000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:25:01,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:25:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-12-13 20:25:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422317433] [2022-12-13 20:25:01,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:25:01,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-13 20:25:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:25:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-13 20:25:01,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=910, Invalid=6062, Unknown=0, NotChecked=0, Total=6972 [2022-12-13 20:25:01,219 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 84 states, 83 states have (on average 5.289156626506024) internal successors, (439), 84 states have internal predecessors, (439), 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 20:25:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:25:02,684 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2022-12-13 20:25:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 20:25:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 5.289156626506024) internal successors, (439), 84 states have internal predecessors, (439), 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 191 [2022-12-13 20:25:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:25:02,685 INFO L225 Difference]: With dead ends: 202 [2022-12-13 20:25:02,685 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 20:25:02,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2458, Invalid=9752, Unknown=0, NotChecked=0, Total=12210 [2022-12-13 20:25:02,686 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 1193 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:25:02,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 961 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:25:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 20:25:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-12-13 20:25:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.020100502512563) internal successors, (203), 200 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:25:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2022-12-13 20:25:02,688 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 191 [2022-12-13 20:25:02,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:25:02,688 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2022-12-13 20:25:02,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 5.289156626506024) internal successors, (439), 84 states have internal predecessors, (439), 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 20:25:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2022-12-13 20:25:02,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-12-13 20:25:02,689 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:25:02,689 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:25:02,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 20:25:02,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-12-13 20:25:02,891 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:25:02,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:25:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 592508225, now seen corresponding path program 21 times [2022-12-13 20:25:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:25:02,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592203270] [2022-12-13 20:25:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:25:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:25:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:25:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:25:04,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:25:04,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592203270] [2022-12-13 20:25:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592203270] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:25:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989373460] [2022-12-13 20:25:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:25:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:25:04,465 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:25:04,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 20:25:08,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-12-13 20:25:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:25:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 245 conjunts are in the unsatisfiable core [2022-12-13 20:25:08,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:25:08,821 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 14 treesize of output 10 [2022-12-13 20:25:11,018 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:25:11,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:25:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:25:11,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:25:12,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:25:12,903 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 99 treesize of output 99 [2022-12-13 20:25:12,914 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 30 treesize of output 26 [2022-12-13 20:25:12,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:25:12,922 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 45 treesize of output 37 [2022-12-13 20:25:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1002 backedges. 34 proven. 737 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-13 20:25:13,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989373460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:25:13,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:25:13,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 46, 45] total 116 [2022-12-13 20:25:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81116569] [2022-12-13 20:25:13,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:25:13,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-12-13 20:25:13,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:25:13,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-12-13 20:25:13,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=12975, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 20:25:13,794 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 116 states, 116 states have (on average 3.913793103448276) internal successors, (454), 116 states have internal predecessors, (454), 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 20:25:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:25:27,747 INFO L93 Difference]: Finished difference Result 562 states and 565 transitions. [2022-12-13 20:25:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-12-13 20:25:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.913793103448276) internal successors, (454), 116 states have internal predecessors, (454), 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 197 [2022-12-13 20:25:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:25:27,748 INFO L225 Difference]: With dead ends: 562 [2022-12-13 20:25:27,748 INFO L226 Difference]: Without dead ends: 215 [2022-12-13 20:25:27,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8810 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=2303, Invalid=50827, Unknown=0, NotChecked=0, Total=53130 [2022-12-13 20:25:27,750 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1392 mSDsluCounter, 5217 mSDsCounter, 0 mSdLazyCounter, 11216 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 5282 SdHoareTripleChecker+Invalid, 11238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:25:27,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1392 Valid, 5282 Invalid, 11238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11216 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-13 20:25:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-12-13 20:25:27,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 209. [2022-12-13 20:25:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 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 20:25:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-12-13 20:25:27,752 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 197 [2022-12-13 20:25:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:25:27,752 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-12-13 20:25:27,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.913793103448276) internal successors, (454), 116 states have internal predecessors, (454), 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 20:25:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-12-13 20:25:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-12-13 20:25:27,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:25:27,753 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:25:27,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 20:25:27,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:27,955 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:25:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:25:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -435876601, now seen corresponding path program 22 times [2022-12-13 20:25:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:25:27,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776374866] [2022-12-13 20:25:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:25:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:25:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:25:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 190 proven. 626 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:29,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:25:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776374866] [2022-12-13 20:25:29,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776374866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:25:29,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554848413] [2022-12-13 20:25:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:25:29,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:29,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:25:29,117 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:25:29,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 20:25:29,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:25:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:25:29,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 119 conjunts are in the unsatisfiable core [2022-12-13 20:25:29,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:25:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:25:31,165 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 20:25:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:31,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554848413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:25:31,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:25:31,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 60 [2022-12-13 20:25:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563341527] [2022-12-13 20:25:31,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:25:31,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 20:25:31,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:25:31,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 20:25:31,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3227, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 20:25:31,491 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 61 states, 60 states have (on average 5.45) internal successors, (327), 61 states have internal predecessors, (327), 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 20:25:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:25:32,649 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-12-13 20:25:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 20:25:32,650 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 5.45) internal successors, (327), 61 states have internal predecessors, (327), 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 205 [2022-12-13 20:25:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:25:32,650 INFO L225 Difference]: With dead ends: 219 [2022-12-13 20:25:32,650 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 20:25:32,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 365 SyntacticMatches, 13 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1110, Invalid=4896, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:25:32,651 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 716 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1228 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:25:32,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1228 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:25:32,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 20:25:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2022-12-13 20:25:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 213 states have (on average 1.0187793427230047) internal successors, (217), 214 states have internal predecessors, (217), 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 20:25:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2022-12-13 20:25:32,653 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 205 [2022-12-13 20:25:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:25:32,653 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2022-12-13 20:25:32,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 5.45) internal successors, (327), 61 states have internal predecessors, (327), 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 20:25:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2022-12-13 20:25:32,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-12-13 20:25:32,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:25:32,654 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:25:32,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-13 20:25:32,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:32,855 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:25:32,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:25:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2029381736, now seen corresponding path program 13 times [2022-12-13 20:25:32,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:25:32,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080788848] [2022-12-13 20:25:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:25:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:25:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:25:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 190 proven. 650 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:34,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:25:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080788848] [2022-12-13 20:25:34,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080788848] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:25:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12797657] [2022-12-13 20:25:34,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:25:34,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:34,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:25:34,316 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:25:34,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 20:25:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:25:34,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-13 20:25:34,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:25:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 231 proven. 609 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:35,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:25:35,671 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 20:25:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1116 backedges. 231 proven. 609 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:35,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12797657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:25:35,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:25:35,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 63 [2022-12-13 20:25:35,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845130382] [2022-12-13 20:25:35,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:25:35,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 20:25:35,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:25:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 20:25:35,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=3579, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 20:25:35,907 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 64 states, 63 states have (on average 5.2063492063492065) internal successors, (328), 64 states have internal predecessors, (328), 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 20:25:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:25:37,363 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2022-12-13 20:25:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 20:25:37,363 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 5.2063492063492065) internal successors, (328), 64 states have internal predecessors, (328), 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 207 [2022-12-13 20:25:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:25:37,364 INFO L225 Difference]: With dead ends: 218 [2022-12-13 20:25:37,364 INFO L226 Difference]: Without dead ends: 218 [2022-12-13 20:25:37,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 368 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1644, Invalid=6912, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 20:25:37,364 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1391 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 2150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:25:37,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 1493 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2150 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:25:37,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-12-13 20:25:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-12-13 20:25:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 216 states have internal predecessors, (219), 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 20:25:37,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2022-12-13 20:25:37,366 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 207 [2022-12-13 20:25:37,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:25:37,366 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2022-12-13 20:25:37,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 5.2063492063492065) internal successors, (328), 64 states have internal predecessors, (328), 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 20:25:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2022-12-13 20:25:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-12-13 20:25:37,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:25:37,373 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:25:37,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-12-13 20:25:37,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 20:25:37,573 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:25:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:25:37,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2090274185, now seen corresponding path program 23 times [2022-12-13 20:25:37,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:25:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544703603] [2022-12-13 20:25:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:25:37,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:25:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:25:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:39,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:25:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544703603] [2022-12-13 20:25:39,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544703603] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:25:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073514347] [2022-12-13 20:25:39,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:25:39,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:25:39,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:25:39,332 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:25:39,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 20:25:41,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-12-13 20:25:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:25:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 266 conjunts are in the unsatisfiable core [2022-12-13 20:25:41,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:25:42,584 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 14 treesize of output 10 [2022-12-13 20:25:45,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:25:45,573 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-12-13 20:25:45,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 13 [2022-12-13 20:25:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:45,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:25:47,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:25:47,913 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 99 treesize of output 99 [2022-12-13 20:25:47,923 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 30 treesize of output 26 [2022-12-13 20:25:47,931 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:25:47,931 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 45 treesize of output 37 [2022-12-13 20:25:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 37 proven. 876 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-12-13 20:25:49,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073514347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:25:49,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:25:49,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 49, 48] total 124 [2022-12-13 20:25:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46012655] [2022-12-13 20:25:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:25:49,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-12-13 20:25:49,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:25:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-12-13 20:25:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=14878, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 20:25:49,064 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 124 states have internal predecessors, (490), 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 20:26:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:26:07,422 INFO L93 Difference]: Finished difference Result 606 states and 609 transitions. [2022-12-13 20:26:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-12-13 20:26:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 124 states have internal predecessors, (490), 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 213 [2022-12-13 20:26:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:26:07,423 INFO L225 Difference]: With dead ends: 606 [2022-12-13 20:26:07,423 INFO L226 Difference]: Without dead ends: 231 [2022-12-13 20:26:07,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11695 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=2560, Invalid=64780, Unknown=0, NotChecked=0, Total=67340 [2022-12-13 20:26:07,425 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 1632 mSDsluCounter, 5755 mSDsCounter, 0 mSdLazyCounter, 12416 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 5824 SdHoareTripleChecker+Invalid, 12440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 12416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-13 20:26:07,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1632 Valid, 5824 Invalid, 12440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 12416 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-13 20:26:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-13 20:26:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2022-12-13 20:26:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 224 states have internal predecessors, (227), 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 20:26:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2022-12-13 20:26:07,427 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 213 [2022-12-13 20:26:07,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:26:07,427 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2022-12-13 20:26:07,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.9516129032258065) internal successors, (490), 124 states have internal predecessors, (490), 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 20:26:07,427 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2022-12-13 20:26:07,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-13 20:26:07,428 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:26:07,428 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:26:07,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-12-13 20:26:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-13 20:26:07,629 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:26:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:26:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1125284175, now seen corresponding path program 24 times [2022-12-13 20:26:07,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:26:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000621301] [2022-12-13 20:26:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:26:07,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:26:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:26:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 231 proven. 731 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:26:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000621301] [2022-12-13 20:26:09,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000621301] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:26:09,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228131630] [2022-12-13 20:26:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:26:09,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:26:09,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:26:09,058 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:26:09,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 20:26:19,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-12-13 20:26:19,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:26:19,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1004 conjuncts, 102 conjunts are in the unsatisfiable core [2022-12-13 20:26:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:26:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:20,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:26:21,006 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 7 treesize of output 5 [2022-12-13 20:26:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1287 backedges. 276 proven. 686 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:21,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228131630] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:26:21,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:26:21,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 77 [2022-12-13 20:26:21,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217826299] [2022-12-13 20:26:21,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:26:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 20:26:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:26:21,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 20:26:21,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=5112, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 20:26:21,282 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 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 20:26:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:26:22,717 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2022-12-13 20:26:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-13 20:26:22,718 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 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 221 [2022-12-13 20:26:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:26:22,718 INFO L225 Difference]: With dead ends: 235 [2022-12-13 20:26:22,718 INFO L226 Difference]: Without dead ends: 235 [2022-12-13 20:26:22,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 381 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2409, Invalid=9147, Unknown=0, NotChecked=0, Total=11556 [2022-12-13 20:26:22,719 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1422 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1422 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:26:22,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1422 Valid, 1087 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 20:26:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-12-13 20:26:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2022-12-13 20:26:22,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.017467248908297) internal successors, (233), 230 states have internal predecessors, (233), 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 20:26:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2022-12-13 20:26:22,722 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2022-12-13 20:26:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:26:22,722 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2022-12-13 20:26:22,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 5.857142857142857) internal successors, (451), 78 states have internal predecessors, (451), 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 20:26:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2022-12-13 20:26:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-12-13 20:26:22,723 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:26:22,723 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:26:22,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 20:26:22,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-12-13 20:26:22,924 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:26:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:26:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash -933666128, now seen corresponding path program 14 times [2022-12-13 20:26:22,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:26:22,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025341221] [2022-12-13 20:26:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:26:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:26:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:26:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 231 proven. 757 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:24,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:26:24,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025341221] [2022-12-13 20:26:24,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025341221] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:26:24,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657921477] [2022-12-13 20:26:24,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:26:24,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:26:24,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:26:24,434 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:26:24,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 20:26:24,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:26:24,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:26:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-13 20:26:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:26:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:25,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:26:25,893 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 20:26:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 276 proven. 712 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:26,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657921477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:26:26,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:26:26,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 67 [2022-12-13 20:26:26,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878571631] [2022-12-13 20:26:26,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:26:26,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-13 20:26:26,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:26:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-13 20:26:26,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4042, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 20:26:26,211 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 states have internal predecessors, (352), 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 20:26:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:26:27,662 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2022-12-13 20:26:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 20:26:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 states have internal predecessors, (352), 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 223 [2022-12-13 20:26:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:26:27,663 INFO L225 Difference]: With dead ends: 234 [2022-12-13 20:26:27,663 INFO L226 Difference]: Without dead ends: 234 [2022-12-13 20:26:27,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 397 SyntacticMatches, 14 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1865, Invalid=7837, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 20:26:27,664 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 997 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 2323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:26:27,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 1588 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 20:26:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-13 20:26:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-12-13 20:26:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 232 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 20:26:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2022-12-13 20:26:27,665 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 223 [2022-12-13 20:26:27,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:26:27,665 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2022-12-13 20:26:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 5.253731343283582) internal successors, (352), 68 states have internal predecessors, (352), 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 20:26:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2022-12-13 20:26:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-12-13 20:26:27,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:26:27,666 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:26:27,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-13 20:26:27,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:26:27,867 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:26:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:26:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash 246919633, now seen corresponding path program 25 times [2022-12-13 20:26:27,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:26:27,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243480760] [2022-12-13 20:26:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:26:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:26:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:26:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:26:32,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:26:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243480760] [2022-12-13 20:26:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243480760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:26:32,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385027330] [2022-12-13 20:26:32,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:26:32,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:26:32,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:26:32,671 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:26:32,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 20:26:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:26:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 308 conjunts are in the unsatisfiable core [2022-12-13 20:26:32,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:26:34,791 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 14 treesize of output 10 [2022-12-13 20:26:38,910 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:26:38,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:26:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:26:38,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:26:42,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:26:42,356 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 99 treesize of output 99 [2022-12-13 20:26:42,374 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 30 treesize of output 26 [2022-12-13 20:26:42,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:26:42,380 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 45 treesize of output 37 [2022-12-13 20:26:43,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-13 20:26:43,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385027330] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:26:43,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:26:43,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 65, 51] total 165 [2022-12-13 20:26:43,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583691614] [2022-12-13 20:26:43,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:26:43,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-12-13 20:26:43,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:26:43,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-12-13 20:26:43,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=26481, Unknown=0, NotChecked=0, Total=27060 [2022-12-13 20:26:43,948 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 165 states, 165 states have (on average 3.7696969696969695) internal successors, (622), 165 states have internal predecessors, (622), 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 20:27:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:27:04,509 INFO L93 Difference]: Finished difference Result 657 states and 661 transitions. [2022-12-13 20:27:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-12-13 20:27:04,510 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 3.7696969696969695) internal successors, (622), 165 states have internal predecessors, (622), 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 229 [2022-12-13 20:27:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:27:04,511 INFO L225 Difference]: With dead ends: 657 [2022-12-13 20:27:04,511 INFO L226 Difference]: Without dead ends: 429 [2022-12-13 20:27:04,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17158 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=3055, Invalid=79601, Unknown=0, NotChecked=0, Total=82656 [2022-12-13 20:27:04,513 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2064 mSDsluCounter, 8137 mSDsCounter, 0 mSdLazyCounter, 17827 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2064 SdHoareTripleChecker+Valid, 8211 SdHoareTripleChecker+Invalid, 17853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 17827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:27:04,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2064 Valid, 8211 Invalid, 17853 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 17827 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-12-13 20:27:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-12-13 20:27:04,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 237. [2022-12-13 20:27:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 236 states have internal predecessors, (239), 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 20:27:04,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 239 transitions. [2022-12-13 20:27:04,515 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 239 transitions. Word has length 229 [2022-12-13 20:27:04,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:27:04,516 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 239 transitions. [2022-12-13 20:27:04,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 3.7696969696969695) internal successors, (622), 165 states have internal predecessors, (622), 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 20:27:04,516 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 239 transitions. [2022-12-13 20:27:04,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-12-13 20:27:04,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:27:04,517 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:27:04,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 20:27:04,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-13 20:27:04,717 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:27:04,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:27:04,717 INFO L85 PathProgramCache]: Analyzing trace with hash 177766420, now seen corresponding path program 26 times [2022-12-13 20:27:04,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:27:04,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762108024] [2022-12-13 20:27:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:27:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:27:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:27:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 40 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:27:08,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:27:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762108024] [2022-12-13 20:27:08,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762108024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:27:08,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828740237] [2022-12-13 20:27:08,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:27:08,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:27:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:27:08,108 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:27:08,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 20:27:08,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:27:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:27:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 195 conjunts are in the unsatisfiable core [2022-12-13 20:27:08,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:27:08,382 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 10 treesize of output 8 [2022-12-13 20:27:10,142 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 14 treesize of output 10 [2022-12-13 20:27:10,216 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 17 treesize of output 19 [2022-12-13 20:27:11,142 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 15 treesize of output 7 [2022-12-13 20:27:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 40 proven. 1404 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:27:11,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:27:11,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:27:11,445 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 23 treesize of output 24 [2022-12-13 20:27:11,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:27:11,448 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 37 treesize of output 32 [2022-12-13 20:27:11,450 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 7 treesize of output 3 [2022-12-13 20:27:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 40 proven. 1027 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:12,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828740237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:27:12,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:27:12,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 36] total 114 [2022-12-13 20:27:12,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257449693] [2022-12-13 20:27:12,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:27:12,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-12-13 20:27:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:27:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-12-13 20:27:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=12428, Unknown=9, NotChecked=0, Total=12882 [2022-12-13 20:27:12,568 INFO L87 Difference]: Start difference. First operand 237 states and 239 transitions. Second operand has 114 states, 114 states have (on average 4.587719298245614) internal successors, (523), 114 states have internal predecessors, (523), 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 20:27:19,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:27:19,201 INFO L93 Difference]: Finished difference Result 419 states and 422 transitions. [2022-12-13 20:27:19,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-13 20:27:19,201 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 4.587719298245614) internal successors, (523), 114 states have internal predecessors, (523), 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 233 [2022-12-13 20:27:19,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:27:19,202 INFO L225 Difference]: With dead ends: 419 [2022-12-13 20:27:19,202 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 20:27:19,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 402 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5903 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1029, Invalid=24402, Unknown=9, NotChecked=0, Total=25440 [2022-12-13 20:27:19,203 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 660 mSDsluCounter, 6106 mSDsCounter, 0 mSdLazyCounter, 10185 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 6196 SdHoareTripleChecker+Invalid, 10198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 10185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:27:19,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 6196 Invalid, 10198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 10185 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 20:27:19,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 20:27:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 241. [2022-12-13 20:27:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 240 states have internal predecessors, (243), 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 20:27:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2022-12-13 20:27:19,205 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 233 [2022-12-13 20:27:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:27:19,205 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2022-12-13 20:27:19,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 4.587719298245614) internal successors, (523), 114 states have internal predecessors, (523), 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 20:27:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2022-12-13 20:27:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-12-13 20:27:19,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:27:19,206 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:27:19,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 20:27:19,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-13 20:27:19,407 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:27:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:27:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2002940311, now seen corresponding path program 27 times [2022-12-13 20:27:19,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:27:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518617137] [2022-12-13 20:27:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:27:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:27:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:27:20,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 276 proven. 844 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:20,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:27:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518617137] [2022-12-13 20:27:20,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518617137] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:27:20,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188070416] [2022-12-13 20:27:20,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:27:20,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:27:20,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:27:20,971 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:27:20,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 20:27:35,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 20:27:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:27:35,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 111 conjunts are in the unsatisfiable core [2022-12-13 20:27:35,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:27:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:35,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:27:36,716 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 7 treesize of output 5 [2022-12-13 20:27:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 325 proven. 795 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:36,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188070416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:27:36,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:27:36,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 82 [2022-12-13 20:27:36,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133698646] [2022-12-13 20:27:36,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:27:36,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 20:27:36,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:27:36,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 20:27:36,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=5790, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 20:27:36,981 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand has 83 states, 82 states have (on average 5.890243902439025) internal successors, (483), 83 states have internal predecessors, (483), 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 20:27:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:27:38,218 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2022-12-13 20:27:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 20:27:38,219 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 5.890243902439025) internal successors, (483), 83 states have internal predecessors, (483), 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 237 [2022-12-13 20:27:38,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:27:38,219 INFO L225 Difference]: With dead ends: 251 [2022-12-13 20:27:38,219 INFO L226 Difference]: Without dead ends: 251 [2022-12-13 20:27:38,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 409 SyntacticMatches, 15 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2729, Invalid=10381, Unknown=0, NotChecked=0, Total=13110 [2022-12-13 20:27:38,220 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1379 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 1599 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:27:38,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 1208 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1599 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:27:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-12-13 20:27:38,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2022-12-13 20:27:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 246 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 20:27:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2022-12-13 20:27:38,223 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 237 [2022-12-13 20:27:38,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:27:38,223 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2022-12-13 20:27:38,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 5.890243902439025) internal successors, (483), 83 states have internal predecessors, (483), 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 20:27:38,223 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2022-12-13 20:27:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-12-13 20:27:38,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:27:38,224 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:27:38,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 20:27:38,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:27:38,425 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:27:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:27:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash 680290552, now seen corresponding path program 15 times [2022-12-13 20:27:38,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:27:38,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966848564] [2022-12-13 20:27:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:27:38,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:27:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:27:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 276 proven. 872 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:27:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966848564] [2022-12-13 20:27:40,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966848564] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:27:40,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760305445] [2022-12-13 20:27:40,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:27:40,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:27:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:27:40,037 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:27:40,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 20:27:53,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 20:27:53,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:27:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 115 conjunts are in the unsatisfiable core [2022-12-13 20:27:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:27:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 325 proven. 823 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:54,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:27:55,714 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 7 treesize of output 5 [2022-12-13 20:27:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 325 proven. 823 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:27:56,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760305445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:27:56,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:27:56,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 86 [2022-12-13 20:27:56,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904464362] [2022-12-13 20:27:56,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:27:56,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-13 20:27:56,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:27:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-13 20:27:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=6439, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 20:27:56,070 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 87 states, 86 states have (on average 5.674418604651163) internal successors, (488), 87 states have internal predecessors, (488), 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 20:27:58,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:27:58,020 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2022-12-13 20:27:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 20:27:58,020 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 5.674418604651163) internal successors, (488), 87 states have internal predecessors, (488), 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 239 [2022-12-13 20:27:58,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:27:58,021 INFO L225 Difference]: With dead ends: 250 [2022-12-13 20:27:58,021 INFO L226 Difference]: Without dead ends: 250 [2022-12-13 20:27:58,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 411 SyntacticMatches, 15 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4576 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2840, Invalid=11440, Unknown=0, NotChecked=0, Total=14280 [2022-12-13 20:27:58,022 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 824 mSDsluCounter, 1245 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:27:58,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1329 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:27:58,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-13 20:27:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-12-13 20:27:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 248 states have internal predecessors, (251), 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 20:27:58,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2022-12-13 20:27:58,023 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2022-12-13 20:27:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:27:58,024 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2022-12-13 20:27:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 5.674418604651163) internal successors, (488), 87 states have internal predecessors, (488), 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 20:27:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2022-12-13 20:27:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-12-13 20:27:58,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:27:58,024 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:27:58,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 20:27:58,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:27:58,225 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:27:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:27:58,226 INFO L85 PathProgramCache]: Analyzing trace with hash -2100370919, now seen corresponding path program 28 times [2022-12-13 20:27:58,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:27:58,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035093688] [2022-12-13 20:27:58,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:27:58,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:27:58,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:00,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:28:00,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035093688] [2022-12-13 20:28:00,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035093688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:28:00,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793732147] [2022-12-13 20:28:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:28:00,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:00,740 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:28:00,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-13 20:28:01,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:28:01,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:28:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 249 conjunts are in the unsatisfiable core [2022-12-13 20:28:01,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:02,689 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 14 treesize of output 10 [2022-12-13 20:28:06,114 INFO L321 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-12-13 20:28:06,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 13 [2022-12-13 20:28:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:28:06,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:28:10,904 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:28:10,904 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 99 treesize of output 99 [2022-12-13 20:28:10,920 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 30 treesize of output 26 [2022-12-13 20:28:10,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:28:10,928 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 45 treesize of output 37 [2022-12-13 20:28:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1611 backedges. 43 proven. 1190 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-12-13 20:28:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793732147] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:28:12,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:28:12,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 55, 54] total 140 [2022-12-13 20:28:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941228992] [2022-12-13 20:28:12,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:28:12,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-12-13 20:28:12,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-12-13 20:28:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=19047, Unknown=0, NotChecked=0, Total=19460 [2022-12-13 20:28:12,381 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 140 states, 140 states have (on average 4.014285714285714) internal successors, (562), 140 states have internal predecessors, (562), 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 20:28:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:28:35,005 INFO L93 Difference]: Finished difference Result 694 states and 697 transitions. [2022-12-13 20:28:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-12-13 20:28:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 4.014285714285714) internal successors, (562), 140 states have internal predecessors, (562), 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 245 [2022-12-13 20:28:35,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:28:35,006 INFO L225 Difference]: With dead ends: 694 [2022-12-13 20:28:35,006 INFO L226 Difference]: Without dead ends: 263 [2022-12-13 20:28:35,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12803 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=2676, Invalid=74886, Unknown=0, NotChecked=0, Total=77562 [2022-12-13 20:28:35,008 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2336 mSDsluCounter, 7892 mSDsCounter, 0 mSdLazyCounter, 17170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2336 SdHoareTripleChecker+Valid, 7972 SdHoareTripleChecker+Invalid, 17198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 17170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:28:35,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2336 Valid, 7972 Invalid, 17198 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 17170 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-13 20:28:35,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-13 20:28:35,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 257. [2022-12-13 20:28:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 256 states have internal predecessors, (259), 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 20:28:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2022-12-13 20:28:35,010 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 245 [2022-12-13 20:28:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:28:35,010 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2022-12-13 20:28:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 4.014285714285714) internal successors, (562), 140 states have internal predecessors, (562), 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 20:28:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2022-12-13 20:28:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-12-13 20:28:35,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:28:35,011 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:28:35,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-13 20:28:35,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:35,212 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-12-13 20:28:35,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:28:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2079263265, now seen corresponding path program 29 times [2022-12-13 20:28:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:28:35,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815119557] [2022-12-13 20:28:35,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:28:35,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:28:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:28:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 325 proven. 965 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-13 20:28:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:28:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815119557] [2022-12-13 20:28:37,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815119557] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:28:37,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887109345] [2022-12-13 20:28:37,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:28:37,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:28:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:28:37,041 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:28:37,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1982851a-c707-4b77-9c2c-9d04afc07374/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-13 20:28:52,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 20:28:52,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:28:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-13 20:28:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:28:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 378 proven. 912 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-13 20:28:53,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:28:54,500 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 20:28:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1725 backedges. 378 proven. 912 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-12-13 20:28:54,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887109345] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:28:54,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:28:54,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 72 [2022-12-13 20:28:54,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972845033] [2022-12-13 20:28:54,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:28:54,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-13 20:28:54,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:28:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-13 20:28:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=4634, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 20:28:54,897 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 73 states, 72 states have (on average 5.541666666666667) internal successors, (399), 73 states have internal predecessors, (399), 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)