./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R --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 64bit --witnessprinter.graph.data.programhash b3793c1153138718c278bf2758234e75646fb19e62e98d110099399474912470 --- 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-38b53e6 [2022-11-25 17:43:10,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:43:10,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:43:10,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:43:10,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:43:10,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:43:10,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:43:10,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:43:10,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:43:10,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:43:10,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:43:10,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:43:10,405 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:43:10,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:43:10,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:43:10,410 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:43:10,411 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:43:10,413 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:43:10,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:43:10,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:43:10,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:43:10,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:43:10,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:43:10,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:43:10,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:43:10,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:43:10,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:43:10,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:43:10,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:43:10,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:43:10,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:43:10,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:43:10,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:43:10,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:43:10,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:43:10,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:43:10,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:43:10,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:43:10,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:43:10,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:43:10,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:43:10,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2022-11-25 17:43:10,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:43:10,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:43:10,506 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:43:10,506 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:43:10,507 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:43:10,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:43:10,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:43:10,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:43:10,509 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:43:10,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:43:10,510 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:43:10,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:43:10,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:43:10,511 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:43:10,512 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:43:10,512 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:43:10,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:43:10,513 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:43:10,513 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:43:10,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:43:10,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:43:10,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:43:10,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:10,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:43:10,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:43:10,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:43:10,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:43:10,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:43:10,517 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:43:10,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:43:10,518 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_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3793c1153138718c278bf2758234e75646fb19e62e98d110099399474912470 [2022-11-25 17:43:10,870 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:43:10,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:43:10,904 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:43:10,907 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:43:10,908 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:43:10,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/termination-15/cstrcpy_malloc.i [2022-11-25 17:43:14,296 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:43:14,621 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:43:14,622 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/sv-benchmarks/c/termination-15/cstrcpy_malloc.i [2022-11-25 17:43:14,644 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/data/5c44be607/9bb998217833418eb6e098ef86e4abe0/FLAG0e23f4d55 [2022-11-25 17:43:14,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/data/5c44be607/9bb998217833418eb6e098ef86e4abe0 [2022-11-25 17:43:14,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:43:14,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:43:14,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:14,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:43:14,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:43:14,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:14" (1/1) ... [2022-11-25 17:43:14,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@142b94e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:14, skipping insertion in model container [2022-11-25 17:43:14,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:14" (1/1) ... [2022-11-25 17:43:14,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:43:14,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:43:15,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:15,208 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:43:15,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:15,280 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:43:15,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15 WrapperNode [2022-11-25 17:43:15,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:15,282 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:15,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:43:15,283 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:43:15,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,350 INFO L138 Inliner]: procedures = 152, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-25 17:43:15,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:15,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:43:15,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:43:15,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:43:15,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,391 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:43:15,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:43:15,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:43:15,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:43:15,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (1/1) ... [2022-11-25 17:43:15,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:15,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:15,446 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:43:15,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:43:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:43:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:43:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:43:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:43:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:43:15,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:43:15,662 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:43:15,665 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:43:16,048 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:43:16,055 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:43:16,055 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:43:16,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:16 BoogieIcfgContainer [2022-11-25 17:43:16,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:43:16,061 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:43:16,061 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:43:16,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:43:16,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:43:14" (1/3) ... [2022-11-25 17:43:16,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64661d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:16, skipping insertion in model container [2022-11-25 17:43:16,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:15" (2/3) ... [2022-11-25 17:43:16,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d64661d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:16, skipping insertion in model container [2022-11-25 17:43:16,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:16" (3/3) ... [2022-11-25 17:43:16,069 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcpy_malloc.i [2022-11-25 17:43:16,093 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:43:16,093 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-25 17:43:16,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:43:16,175 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;@78288cfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:43:16,175 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-25 17:43:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:43:16,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:16,192 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:43:16,192 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:16,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:16,201 INFO L85 PathProgramCache]: Analyzing trace with hash 889510835, now seen corresponding path program 1 times [2022-11-25 17:43:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724782225] [2022-11-25 17:43:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:16,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:16,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724782225] [2022-11-25 17:43:16,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724782225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:16,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:16,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:43:16,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884727163] [2022-11-25 17:43:16,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:43:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:16,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:43:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:43:16,509 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 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 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:16,570 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-11-25 17:43:16,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:43:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 17:43:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:16,583 INFO L225 Difference]: With dead ends: 40 [2022-11-25 17:43:16,584 INFO L226 Difference]: Without dead ends: 36 [2022-11-25 17:43:16,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:16,593 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:16,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-25 17:43:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-11-25 17:43:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 33 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) [2022-11-25 17:43:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-11-25 17:43:16,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 6 [2022-11-25 17:43:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:16,633 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-11-25 17:43:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-11-25 17:43:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:43:16,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:16,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:43:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:43:16,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 889510859, now seen corresponding path program 1 times [2022-11-25 17:43:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871138929] [2022-11-25 17:43:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:16,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:16,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871138929] [2022-11-25 17:43:16,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871138929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:16,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:16,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:16,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538335805] [2022-11-25 17:43:16,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:16,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:16,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:16,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:16,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:16,793 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:16,831 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-25 17:43:16,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:16,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 17:43:16,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:16,834 INFO L225 Difference]: With dead ends: 33 [2022-11-25 17:43:16,834 INFO L226 Difference]: Without dead ends: 33 [2022-11-25 17:43:16,834 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 [2022-11-25 17:43:16,836 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:16,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-25 17:43:16,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-25 17:43:16,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-25 17:43:16,843 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-11-25 17:43:16,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:16,844 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-25 17:43:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-25 17:43:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:43:16,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:16,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:43:16,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:43:16,846 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:16,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 889510860, now seen corresponding path program 1 times [2022-11-25 17:43:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637527667] [2022-11-25 17:43:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:17,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637527667] [2022-11-25 17:43:17,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637527667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:17,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:17,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:43:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613210922] [2022-11-25 17:43:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:43:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:43:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:43:17,143 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:17,201 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-25 17:43:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:43:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 17:43:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:17,203 INFO L225 Difference]: With dead ends: 58 [2022-11-25 17:43:17,204 INFO L226 Difference]: Without dead ends: 58 [2022-11-25 17:43:17,205 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 [2022-11-25 17:43:17,207 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:17,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:17,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-25 17:43:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-11-25 17:43:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.696969696969697) internal successors, (56), 44 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) [2022-11-25 17:43:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-25 17:43:17,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 6 [2022-11-25 17:43:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:17,225 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-25 17:43:17,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-25 17:43:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:43:17,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:17,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:43:17,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:43:17,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:17,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash 889512757, now seen corresponding path program 1 times [2022-11-25 17:43:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175768657] [2022-11-25 17:43:17,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:17,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:17,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:17,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175768657] [2022-11-25 17:43:17,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175768657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:17,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:17,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:17,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824952163] [2022-11-25 17:43:17,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:17,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:17,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:17,300 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:17,324 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-25 17:43:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 17:43:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:17,325 INFO L225 Difference]: With dead ends: 46 [2022-11-25 17:43:17,325 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 17:43:17,326 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 [2022-11-25 17:43:17,327 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 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 [2022-11-25 17:43:17,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:17,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 17:43:17,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-25 17:43:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 44 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) [2022-11-25 17:43:17,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2022-11-25 17:43:17,333 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 6 [2022-11-25 17:43:17,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:17,334 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2022-11-25 17:43:17,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,334 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2022-11-25 17:43:17,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 17:43:17,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:17,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:43:17,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:43:17,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:17,336 INFO L85 PathProgramCache]: Analyzing trace with hash 889512782, now seen corresponding path program 1 times [2022-11-25 17:43:17,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:17,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807406819] [2022-11-25 17:43:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:17,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807406819] [2022-11-25 17:43:17,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807406819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:17,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:17,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:43:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767475085] [2022-11-25 17:43:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:17,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:43:17,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:17,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:43:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:17,657 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:17,724 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-11-25 17:43:17,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:43:17,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-11-25 17:43:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:17,727 INFO L225 Difference]: With dead ends: 43 [2022-11-25 17:43:17,727 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:43:17,727 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 [2022-11-25 17:43:17,729 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 76 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:17,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 17 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:43:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-11-25 17:43:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.6) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-11-25 17:43:17,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 6 [2022-11-25 17:43:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:17,738 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-11-25 17:43:17,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-11-25 17:43:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:43:17,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:17,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:17,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:43:17,744 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:17,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:17,745 INFO L85 PathProgramCache]: Analyzing trace with hash -530222641, now seen corresponding path program 1 times [2022-11-25 17:43:17,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:17,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656548415] [2022-11-25 17:43:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:17,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:17,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656548415] [2022-11-25 17:43:17,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656548415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:17,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:17,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:43:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526422424] [2022-11-25 17:43:17,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:17,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:43:17,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:43:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:17,869 INFO L87 Difference]: Start difference. First operand 30 states and 32 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) [2022-11-25 17:43:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:17,947 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-25 17:43:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:43:17,948 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 [2022-11-25 17:43:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:17,953 INFO L225 Difference]: With dead ends: 29 [2022-11-25 17:43:17,953 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:43:17,954 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 [2022-11-25 17:43:17,956 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:17,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:43:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 17:43:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-25 17:43:17,971 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 9 [2022-11-25 17:43:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:17,971 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-25 17:43:17,972 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) [2022-11-25 17:43:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-25 17:43:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:43:17,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:17,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:17,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:43:17,974 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash -530222640, now seen corresponding path program 1 times [2022-11-25 17:43:17,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:17,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020017707] [2022-11-25 17:43:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:18,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:18,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:18,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020017707] [2022-11-25 17:43:18,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020017707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:18,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:18,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:43:18,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360177875] [2022-11-25 17:43:18,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:18,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:43:18,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:43:18,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:43:18,280 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-25 17:43:18,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:18,390 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-11-25 17:43:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:43:18,393 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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 [2022-11-25 17:43:18,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:18,394 INFO L225 Difference]: With dead ends: 35 [2022-11-25 17:43:18,394 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 17:43:18,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:43:18,400 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:18,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 63 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 17:43:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-11-25 17:43:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-11-25 17:43:18,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 9 [2022-11-25 17:43:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:18,411 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-11-25 17:43:18,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2022-11-25 17:43:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-11-25 17:43:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:43:18,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:18,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:18,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:43:18,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash 742967315, now seen corresponding path program 1 times [2022-11-25 17:43:18,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:18,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240743144] [2022-11-25 17:43:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:18,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:18,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240743144] [2022-11-25 17:43:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240743144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:18,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:18,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:43:18,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253647133] [2022-11-25 17:43:18,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:18,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:43:18,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:18,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:43:18,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:43:18,568 INFO L87 Difference]: Start difference. First operand 31 states and 33 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) [2022-11-25 17:43:18,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:18,635 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-25 17:43:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:43:18,636 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 [2022-11-25 17:43:18,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:18,637 INFO L225 Difference]: With dead ends: 29 [2022-11-25 17:43:18,637 INFO L226 Difference]: Without dead ends: 29 [2022-11-25 17:43:18,637 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 [2022-11-25 17:43:18,638 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:18,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-25 17:43:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-25 17:43:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-25 17:43:18,641 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2022-11-25 17:43:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:18,642 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-25 17:43:18,642 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) [2022-11-25 17:43:18,642 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-25 17:43:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:43:18,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:18,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:18,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:43:18,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:18,644 INFO L85 PathProgramCache]: Analyzing trace with hash 742967316, now seen corresponding path program 1 times [2022-11-25 17:43:18,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:18,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078545980] [2022-11-25 17:43:18,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:18,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078545980] [2022-11-25 17:43:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078545980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:18,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:18,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:43:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998471806] [2022-11-25 17:43:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:18,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:43:18,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:43:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:43:18,885 INFO L87 Difference]: Start difference. First operand 29 states and 31 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) [2022-11-25 17:43:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:19,081 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2022-11-25 17:43:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:43:19,085 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 [2022-11-25 17:43:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:19,086 INFO L225 Difference]: With dead ends: 56 [2022-11-25 17:43:19,086 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 17:43:19,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:43:19,087 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 75 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 [2022-11-25 17:43:19,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 75 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 17:43:19,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 43. [2022-11-25 17:43:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-11-25 17:43:19,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2022-11-25 17:43:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:19,091 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-11-25 17:43:19,092 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) [2022-11-25 17:43:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-11-25 17:43:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:43:19,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:19,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:19,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:43:19,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash -66379310, now seen corresponding path program 1 times [2022-11-25 17:43:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:19,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986737202] [2022-11-25 17:43:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:19,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986737202] [2022-11-25 17:43:19,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986737202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:19,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:19,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:43:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427921973] [2022-11-25 17:43:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:19,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:43:19,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:19,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:43:19,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:43:19,315 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-11-25 17:43:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:19,447 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-11-25 17:43:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:43:19,448 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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 [2022-11-25 17:43:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:19,449 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:43:19,449 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 17:43:19,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:43:19,450 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:19,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 17:43:19,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2022-11-25 17:43:19,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-25 17:43:19,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2022-11-25 17:43:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-25 17:43:19,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-11-25 17:43:19,454 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-25 17:43:19,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:43:19,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:19,455 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:19,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:43:19,455 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:19,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:19,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1772813464, now seen corresponding path program 1 times [2022-11-25 17:43:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079869496] [2022-11-25 17:43:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079869496] [2022-11-25 17:43:19,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079869496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:19,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:19,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:43:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974608355] [2022-11-25 17:43:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:19,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:43:19,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:19,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:43:19,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:43:19,684 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2022-11-25 17:43:19,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:19,849 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-25 17:43:19,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:43:19,850 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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 [2022-11-25 17:43:19,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:19,851 INFO L225 Difference]: With dead ends: 49 [2022-11-25 17:43:19,851 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 17:43:19,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:43:19,852 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:19,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 122 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 17:43:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 36. [2022-11-25 17:43:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-11-25 17:43:19,855 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 13 [2022-11-25 17:43:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:19,855 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-11-25 17:43:19,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 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) [2022-11-25 17:43:19,856 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-11-25 17:43:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:43:19,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:19,856 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:19,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:43:19,857 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1379786454, now seen corresponding path program 1 times [2022-11-25 17:43:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:19,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340720983] [2022-11-25 17:43:19,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:20,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:20,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340720983] [2022-11-25 17:43:20,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340720983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:20,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:20,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 17:43:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125118553] [2022-11-25 17:43:20,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:43:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:43:20,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:43:20,112 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2022-11-25 17:43:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:20,311 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-11-25 17:43:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:43:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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 [2022-11-25 17:43:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:20,312 INFO L225 Difference]: With dead ends: 64 [2022-11-25 17:43:20,313 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 17:43:20,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:43:20,314 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:20,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 144 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:43:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 17:43:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2022-11-25 17:43:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:20,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-11-25 17:43:20,316 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 13 [2022-11-25 17:43:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:20,317 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-11-25 17:43:20,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2022-11-25 17:43:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-11-25 17:43:20,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 17:43:20,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:20,318 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:20,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:43:20,318 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2080851032, now seen corresponding path program 1 times [2022-11-25 17:43:20,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:20,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20164774] [2022-11-25 17:43:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:20,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:20,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20164774] [2022-11-25 17:43:20,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20164774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:20,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262683318] [2022-11-25 17:43:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:20,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:43:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:20,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 17:43:20,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:21,057 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 [2022-11-25 17:43:21,394 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:21,394 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 20 treesize of output 17 [2022-11-25 17:43:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:21,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:22,016 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 [2022-11-25 17:43:22,034 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 20 treesize of output 16 [2022-11-25 17:43:22,049 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 39 treesize of output 31 [2022-11-25 17:43:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:22,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262683318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:22,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:22,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-25 17:43:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185198760] [2022-11-25 17:43:22,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 17:43:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 17:43:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:43:22,072 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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) [2022-11-25 17:43:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:23,331 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-25 17:43:23,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:43:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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 13 [2022-11-25 17:43:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:23,334 INFO L225 Difference]: With dead ends: 43 [2022-11-25 17:43:23,334 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:43:23,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:43:23,335 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:23,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 203 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:43:23,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:43:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-11-25 17:43:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-25 17:43:23,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 13 [2022-11-25 17:43:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:23,339 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-25 17:43:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 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) [2022-11-25 17:43:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-25 17:43:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 17:43:23,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:23,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:23,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:23,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:23,547 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:23,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:23,548 INFO L85 PathProgramCache]: Analyzing trace with hash 81872524, now seen corresponding path program 1 times [2022-11-25 17:43:23,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483971140] [2022-11-25 17:43:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:23,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:24,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483971140] [2022-11-25 17:43:24,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483971140] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:24,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740239254] [2022-11-25 17:43:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:24,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:24,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:24,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:43:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:43:24,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:24,531 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:43:24,531 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 [2022-11-25 17:43:24,554 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 [2022-11-25 17:43:24,604 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 [2022-11-25 17:43:24,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:24,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-25 17:43:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:25,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:25,458 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 13 treesize of output 11 [2022-11-25 17:43:25,462 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 14 treesize of output 12 [2022-11-25 17:43:25,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 17:43:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740239254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:25,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-11-25 17:43:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728994805] [2022-11-25 17:43:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:25,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 17:43:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:25,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 17:43:25,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2022-11-25 17:43:25,667 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:27,778 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-25 17:43:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:43:27,779 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 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 [2022-11-25 17:43:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:27,780 INFO L225 Difference]: With dead ends: 42 [2022-11-25 17:43:27,780 INFO L226 Difference]: Without dead ends: 42 [2022-11-25 17:43:27,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=335, Invalid=1557, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 17:43:27,781 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 310 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:27,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 107 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:43:27,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-25 17:43:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-25 17:43:27,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-11-25 17:43:27,784 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 14 [2022-11-25 17:43:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:27,785 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-11-25 17:43:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-11-25 17:43:27,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 17:43:27,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:27,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:27,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 17:43:27,987 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1429662826, now seen corresponding path program 1 times [2022-11-25 17:43:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987739843] [2022-11-25 17:43:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:27,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987739843] [2022-11-25 17:43:28,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987739843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:28,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:28,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672881499] [2022-11-25 17:43:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:28,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:28,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:28,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:28,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:28,029 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-25 17:43:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:28,038 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-25 17:43:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 [2022-11-25 17:43:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:28,041 INFO L225 Difference]: With dead ends: 38 [2022-11-25 17:43:28,041 INFO L226 Difference]: Without dead ends: 38 [2022-11-25 17:43:28,043 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 [2022-11-25 17:43:28,044 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:28,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-25 17:43:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-25 17:43:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-25 17:43:28,052 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 15 [2022-11-25 17:43:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:28,052 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-25 17:43:28,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-25 17:43:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-25 17:43:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:43:28,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:28,057 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:28,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:43:28,058 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash -477082848, now seen corresponding path program 2 times [2022-11-25 17:43:28,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:28,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079981669] [2022-11-25 17:43:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:28,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079981669] [2022-11-25 17:43:28,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079981669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:28,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401579569] [2022-11-25 17:43:28,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:43:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:28,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:28,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:43:29,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:43:29,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:29,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-25 17:43:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:29,070 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 [2022-11-25 17:43:29,113 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 [2022-11-25 17:43:29,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2022-11-25 17:43:29,734 INFO L321 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2022-11-25 17:43:29,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2022-11-25 17:43:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:29,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:34,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:34,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 36 [2022-11-25 17:43:34,894 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 38 treesize of output 34 [2022-11-25 17:43:34,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-25 17:43:34,939 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 [2022-11-25 17:43:34,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 17:43:35,064 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 [2022-11-25 17:43:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:35,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401579569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:35,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:35,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-11-25 17:43:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576589090] [2022-11-25 17:43:35,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:35,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 17:43:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 17:43:35,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1014, Unknown=4, NotChecked=0, Total=1122 [2022-11-25 17:43:35,094 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:38,819 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-25 17:43:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:43:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-25 17:43:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:38,820 INFO L225 Difference]: With dead ends: 56 [2022-11-25 17:43:38,820 INFO L226 Difference]: Without dead ends: 56 [2022-11-25 17:43:38,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=321, Invalid=1931, Unknown=4, NotChecked=0, Total=2256 [2022-11-25 17:43:38,822 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:38,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 227 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 17:43:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-25 17:43:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2022-11-25 17:43:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.236842105263158) internal successors, (47), 41 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) [2022-11-25 17:43:38,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-25 17:43:38,824 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2022-11-25 17:43:38,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:38,825 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-25 17:43:38,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-25 17:43:38,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:43:38,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:38,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:38,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:39,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:43:39,035 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2105505565, now seen corresponding path program 1 times [2022-11-25 17:43:39,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:39,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343032823] [2022-11-25 17:43:39,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:39,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:39,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:39,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343032823] [2022-11-25 17:43:39,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343032823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:39,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:39,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351217069] [2022-11-25 17:43:39,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:39,091 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:39,104 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-25 17:43:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:39,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2022-11-25 17:43:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:39,106 INFO L225 Difference]: With dead ends: 41 [2022-11-25 17:43:39,106 INFO L226 Difference]: Without dead ends: 41 [2022-11-25 17:43:39,106 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 [2022-11-25 17:43:39,107 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:39,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:39,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-25 17:43:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-25 17:43:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 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) [2022-11-25 17:43:39,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-25 17:43:39,111 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 18 [2022-11-25 17:43:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:39,112 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-25 17:43:39,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,112 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-25 17:43:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:43:39,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:39,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:39,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 17:43:39,114 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:39,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:39,114 INFO L85 PathProgramCache]: Analyzing trace with hash 846163162, now seen corresponding path program 1 times [2022-11-25 17:43:39,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:39,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378429572] [2022-11-25 17:43:39,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:39,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:39,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:39,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378429572] [2022-11-25 17:43:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378429572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:39,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:39,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:43:39,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251389681] [2022-11-25 17:43:39,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:39,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:43:39,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:39,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:43:39,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:39,223 INFO L87 Difference]: Start difference. First operand 41 states and 46 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) [2022-11-25 17:43:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:39,250 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-25 17:43:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:43:39,251 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 [2022-11-25 17:43:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:39,252 INFO L225 Difference]: With dead ends: 40 [2022-11-25 17:43:39,252 INFO L226 Difference]: Without dead ends: 40 [2022-11-25 17:43:39,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:39,253 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:39,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-25 17:43:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-11-25 17:43:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 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) [2022-11-25 17:43:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-25 17:43:39,258 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2022-11-25 17:43:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:39,260 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-25 17:43:39,260 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) [2022-11-25 17:43:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-25 17:43:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 17:43:39,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:39,263 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] [2022-11-25 17:43:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:43:39,263 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 461254336, now seen corresponding path program 1 times [2022-11-25 17:43:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892316266] [2022-11-25 17:43:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892316266] [2022-11-25 17:43:39,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892316266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:39,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:39,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:43:39,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95518859] [2022-11-25 17:43:39,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:43:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:43:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:43:39,466 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:43:39,563 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-25 17:43:39,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:43:39,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-25 17:43:39,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:43:39,564 INFO L225 Difference]: With dead ends: 39 [2022-11-25 17:43:39,564 INFO L226 Difference]: Without dead ends: 22 [2022-11-25 17:43:39,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:43:39,565 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:43:39,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:43:39,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-25 17:43:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-25 17:43:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2022-11-25 17:43:39,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2022-11-25 17:43:39,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:43:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2022-11-25 17:43:39,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:43:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2022-11-25 17:43:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:43:39,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:43:39,567 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:39,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-25 17:43:39,568 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-25 17:43:39,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:39,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1104630296, now seen corresponding path program 3 times [2022-11-25 17:43:39,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:39,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962180892] [2022-11-25 17:43:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:39,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:40,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:40,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962180892] [2022-11-25 17:43:40,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962180892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:40,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640192021] [2022-11-25 17:43:40,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:43:40,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:40,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:40,628 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:43:40,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 17:43:40,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:43:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 17:43:40,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:40,804 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 [2022-11-25 17:43:40,853 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 [2022-11-25 17:43:41,260 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 24 treesize of output 24 [2022-11-25 17:43:41,814 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 32 treesize of output 30 [2022-11-25 17:43:44,447 INFO L321 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2022-11-25 17:43:44,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2022-11-25 17:43:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:44,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:53,816 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 44 [2022-11-25 17:43:53,858 INFO L321 Elim1Store]: treesize reduction 25, result has 44.4 percent of original size [2022-11-25 17:43:53,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 34 treesize of output 39 [2022-11-25 17:43:53,924 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 17:43:53,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 90 [2022-11-25 17:43:53,946 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 [2022-11-25 17:43:53,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-25 17:43:54,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-25 17:43:54,776 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 [2022-11-25 17:43:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:54,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640192021] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:54,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:54,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 46 [2022-11-25 17:43:54,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298841417] [2022-11-25 17:43:54,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-25 17:43:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:54,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-25 17:43:54,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1988, Unknown=19, NotChecked=0, Total=2162 [2022-11-25 17:43:54,815 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 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) [2022-11-25 17:44:02,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-25 17:44:21,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:44:21,018 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-11-25 17:44:21,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-25 17:44:21,019 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 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) Word has length 21 [2022-11-25 17:44:21,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:44:21,019 INFO L225 Difference]: With dead ends: 23 [2022-11-25 17:44:21,019 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 17:44:21,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=483, Invalid=3278, Unknown=21, NotChecked=0, Total=3782 [2022-11-25 17:44:21,021 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 78 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 26 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:44:21,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 98 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 360 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-11-25 17:44:21,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 17:44:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 17:44:21,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:44:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 17:44:21,023 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-11-25 17:44:21,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:44:21,023 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 17:44:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 47 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) [2022-11-25 17:44:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 17:44:21,024 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 17:44:21,026 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 13 remaining) [2022-11-25 17:44:21,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2022-11-25 17:44:21,027 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2022-11-25 17:44:21,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 13 remaining) [2022-11-25 17:44:21,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2022-11-25 17:44:21,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2022-11-25 17:44:21,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (6 of 13 remaining) [2022-11-25 17:44:21,028 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE (5 of 13 remaining) [2022-11-25 17:44:21,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (4 of 13 remaining) [2022-11-25 17:44:21,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (3 of 13 remaining) [2022-11-25 17:44:21,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (2 of 13 remaining) [2022-11-25 17:44:21,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (1 of 13 remaining) [2022-11-25 17:44:21,029 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2022-11-25 17:44:21,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:44:21,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:44:21,238 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:44:21,240 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:44:21,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:44:21 BoogieIcfgContainer [2022-11-25 17:44:21,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:44:21,244 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:44:21,244 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:44:21,245 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:44:21,245 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:16" (3/4) ... [2022-11-25 17:44:21,248 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 17:44:21,261 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-25 17:44:21,261 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-11-25 17:44:21,261 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 17:44:21,262 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 17:44:21,299 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 17:44:21,299 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:44:21,300 INFO L158 Benchmark]: Toolchain (without parser) took 66633.80ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 152.9MB in the beginning and 118.1MB in the end (delta: 34.8MB). Peak memory consumption was 72.6MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,300 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:44:21,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 613.35ms. Allocated memory is still 182.5MB. Free memory was 152.0MB in the beginning and 143.6MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,301 INFO L158 Benchmark]: Boogie Procedure Inliner took 68.23ms. Allocated memory is still 182.5MB. Free memory was 143.6MB in the beginning and 141.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,301 INFO L158 Benchmark]: Boogie Preprocessor took 43.74ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 140.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,301 INFO L158 Benchmark]: RCFGBuilder took 662.40ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 126.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,302 INFO L158 Benchmark]: TraceAbstraction took 65182.93ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 126.5MB in the beginning and 121.7MB in the end (delta: 4.8MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,302 INFO L158 Benchmark]: Witness Printer took 55.11ms. Allocated memory is still 220.2MB. Free memory was 121.7MB in the beginning and 118.1MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 17:44:21,304 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 125.8MB. Free memory is still 96.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 613.35ms. Allocated memory is still 182.5MB. Free memory was 152.0MB in the beginning and 143.6MB in the end (delta: 8.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 68.23ms. Allocated memory is still 182.5MB. Free memory was 143.6MB in the beginning and 141.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.74ms. Allocated memory is still 182.5MB. Free memory was 141.5MB in the beginning and 140.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 662.40ms. Allocated memory is still 182.5MB. Free memory was 140.3MB in the beginning and 126.8MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 65182.93ms. Allocated memory was 182.5MB in the beginning and 220.2MB in the end (delta: 37.7MB). Free memory was 126.5MB in the beginning and 121.7MB in the end (delta: 4.8MB). Peak memory consumption was 45.1MB. Max. memory is 16.1GB. * Witness Printer took 55.11ms. Allocated memory is still 220.2MB. Free memory was 121.7MB in the beginning and 118.1MB in the end (delta: 3.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 386]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 387]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 372]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 65.1s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 34.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1217 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1217 mSDsluCounter, 1471 SdHoareTripleChecker+Invalid, 5.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1103 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1832 IncrementalHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 368 mSDtfsCounter, 1832 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 314 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 48.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, InterpolantAutomatonStates: 145, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 121 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 28.0s InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 343 ConstructedInterpolants, 40 QuantifiedInterpolants, 4449 SizeOfPredicates, 81 NumberOfNonLiveVariables, 583 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 28 InterpolantComputations, 16 PerfectInterpolantSequences, 5/97 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-25 17:44:21,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2eaceb31-0044-4056-b533-0a61db7c40ff/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE