./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:22:43,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:22:43,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:22:43,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:22:43,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:22:43,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:22:43,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:22:43,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:22:43,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:22:43,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:22:43,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:22:43,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:22:43,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:22:43,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:22:43,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:22:43,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:22:43,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:22:43,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:22:43,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:22:43,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:22:43,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:22:43,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:22:43,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:22:43,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:22:43,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:22:43,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:22:43,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:22:43,496 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:22:43,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:22:43,498 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:22:43,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:22:43,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:22:43,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:22:43,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:22:43,502 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:22:43,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:22:43,503 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:22:43,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:22:43,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:22:43,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:22:43,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:22:43,504 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:22:43,528 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:22:43,528 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:22:43,528 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:22:43,528 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:22:43,529 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:22:43,529 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:22:43,529 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:22:43,536 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:22:43,536 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:22:43,536 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:22:43,537 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:22:43,537 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:22:43,537 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:22:43,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:22:43,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:22:43,538 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:22:43,538 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:22:43,538 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:22:43,538 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:22:43,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:22:43,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:22:43,540 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:22:43,540 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:22:43,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:22:43,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:22:43,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:22:43,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:22:43,541 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:22:43,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:22:43,541 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:22:43,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:22:43,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:22:43,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-12-14 07:22:43,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:22:43,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:22:43,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:22:43,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:22:43,729 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:22:43,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-14 07:22:46,265 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:22:46,423 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:22:46,424 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-12-14 07:22:46,434 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/data/dfb9238d9/06a7c438f06a469dad07396f344572b8/FLAGdbe45f215 [2022-12-14 07:22:46,445 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/data/dfb9238d9/06a7c438f06a469dad07396f344572b8 [2022-12-14 07:22:46,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:22:46,448 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:22:46,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:22:46,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:22:46,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:22:46,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c51a34d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46, skipping insertion in model container [2022-12-14 07:22:46,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:22:46,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:22:46,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:22:46,748 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:22:46,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:22:46,821 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:22:46,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46 WrapperNode [2022-12-14 07:22:46,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:22:46,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:22:46,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:22:46,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:22:46,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,856 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2022-12-14 07:22:46,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:22:46,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:22:46,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:22:46,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:22:46,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,877 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:22:46,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:22:46,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:22:46,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:22:46,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (1/1) ... [2022-12-14 07:22:46,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:22:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:22:46,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:22:46,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:22:46,936 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-12-14 07:22:46,936 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:22:46,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:22:46,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:22:47,037 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:22:47,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:22:47,403 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:22:47,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:22:47,456 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 07:22:47,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:22:47 BoogieIcfgContainer [2022-12-14 07:22:47,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:22:47,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:22:47,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:22:47,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:22:47,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:22:46" (1/3) ... [2022-12-14 07:22:47,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316e5ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:22:47, skipping insertion in model container [2022-12-14 07:22:47,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:22:46" (2/3) ... [2022-12-14 07:22:47,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@316e5ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:22:47, skipping insertion in model container [2022-12-14 07:22:47,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:22:47" (3/3) ... [2022-12-14 07:22:47,464 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-12-14 07:22:47,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:22:47,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-12-14 07:22:47,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:22:47,516 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=FINITE_AUTOMATA, 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;@50b55d28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:22:47,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-14 07:22:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:22:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:22:47,524 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:47,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:22:47,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash 11002870, now seen corresponding path program 1 times [2022-12-14 07:22:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:47,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202401385] [2022-12-14 07:22:47,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:47,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:47,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:47,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202401385] [2022-12-14 07:22:47,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202401385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:47,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:47,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:22:47,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716670865] [2022-12-14 07:22:47,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:47,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:22:47,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:22:47,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:22:47,697 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:47,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:47,760 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-12-14 07:22:47,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:22:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 07:22:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:47,768 INFO L225 Difference]: With dead ends: 138 [2022-12-14 07:22:47,768 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 07:22:47,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:22:47,771 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:47,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:22:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 07:22:47,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-14 07:22:47,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:22:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-12-14 07:22:47,799 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2022-12-14 07:22:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:47,799 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-12-14 07:22:47,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-12-14 07:22:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:22:47,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:47,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:22:47,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:22:47,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash 342925543, now seen corresponding path program 1 times [2022-12-14 07:22:47,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:47,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201580274] [2022-12-14 07:22:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:47,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:47,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201580274] [2022-12-14 07:22:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201580274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:47,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:47,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:22:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279044343] [2022-12-14 07:22:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:47,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:22:47,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:47,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:22:47,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:47,886 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:48,091 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-12-14 07:22:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:22:48,091 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:22:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:48,094 INFO L225 Difference]: With dead ends: 267 [2022-12-14 07:22:48,094 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 07:22:48,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:48,095 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 135 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:48,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 154 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 07:22:48,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2022-12-14 07:22:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:22:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2022-12-14 07:22:48,106 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2022-12-14 07:22:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:48,106 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2022-12-14 07:22:48,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2022-12-14 07:22:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:22:48,107 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:48,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:22:48,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:22:48,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash 342925544, now seen corresponding path program 1 times [2022-12-14 07:22:48,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495603957] [2022-12-14 07:22:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:48,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:48,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:48,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495603957] [2022-12-14 07:22:48,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495603957] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:48,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:48,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:22:48,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662205931] [2022-12-14 07:22:48,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:48,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:48,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:48,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:48,270 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:48,479 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2022-12-14 07:22:48,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:22:48,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-12-14 07:22:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:48,481 INFO L225 Difference]: With dead ends: 284 [2022-12-14 07:22:48,481 INFO L226 Difference]: Without dead ends: 284 [2022-12-14 07:22:48,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:48,482 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 102 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:48,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 274 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-12-14 07:22:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2022-12-14 07:22:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 229 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 349 transitions. [2022-12-14 07:22:48,495 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 349 transitions. Word has length 5 [2022-12-14 07:22:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:48,495 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 349 transitions. [2022-12-14 07:22:48,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 349 transitions. [2022-12-14 07:22:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:22:48,496 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:48,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:22:48,496 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1160985209, now seen corresponding path program 1 times [2022-12-14 07:22:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:48,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513791091] [2022-12-14 07:22:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:48,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:48,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513791091] [2022-12-14 07:22:48,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513791091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:48,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:48,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:22:48,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165886412] [2022-12-14 07:22:48,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:48,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:22:48,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:22:48,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:48,525 INFO L87 Difference]: Start difference. First operand 240 states and 349 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:48,660 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2022-12-14 07:22:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:22:48,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:22:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:48,663 INFO L225 Difference]: With dead ends: 296 [2022-12-14 07:22:48,663 INFO L226 Difference]: Without dead ends: 295 [2022-12-14 07:22:48,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:48,664 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:48,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:48,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-12-14 07:22:48,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 241. [2022-12-14 07:22:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 162 states have (on average 2.0617283950617282) internal successors, (334), 230 states have internal predecessors, (334), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 350 transitions. [2022-12-14 07:22:48,677 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 350 transitions. Word has length 7 [2022-12-14 07:22:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:48,678 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 350 transitions. [2022-12-14 07:22:48,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 350 transitions. [2022-12-14 07:22:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:22:48,678 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:48,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:48,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 07:22:48,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:48,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:48,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1160986959, now seen corresponding path program 1 times [2022-12-14 07:22:48,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:48,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775651470] [2022-12-14 07:22:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:48,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775651470] [2022-12-14 07:22:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775651470] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:48,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:48,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:22:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276401086] [2022-12-14 07:22:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:48,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:22:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:22:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:48,716 INFO L87 Difference]: Start difference. First operand 241 states and 350 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:48,776 INFO L93 Difference]: Finished difference Result 350 states and 469 transitions. [2022-12-14 07:22:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:22:48,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 07:22:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:48,777 INFO L225 Difference]: With dead ends: 350 [2022-12-14 07:22:48,778 INFO L226 Difference]: Without dead ends: 347 [2022-12-14 07:22:48,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:48,778 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:48,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 251 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-12-14 07:22:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 239. [2022-12-14 07:22:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 160 states have (on average 2.06875) internal successors, (331), 228 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:48,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 347 transitions. [2022-12-14 07:22:48,786 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 347 transitions. Word has length 7 [2022-12-14 07:22:48,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:48,786 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 347 transitions. [2022-12-14 07:22:48,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:22:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 347 transitions. [2022-12-14 07:22:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:22:48,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:48,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:48,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 07:22:48,787 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:48,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:48,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1412186604, now seen corresponding path program 1 times [2022-12-14 07:22:48,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:48,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280386269] [2022-12-14 07:22:48,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:48,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:48,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:48,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280386269] [2022-12-14 07:22:48,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280386269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:48,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:48,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:22:48,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787939616] [2022-12-14 07:22:48,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:48,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:48,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:48,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:48,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:48,886 INFO L87 Difference]: Start difference. First operand 239 states and 347 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:49,156 INFO L93 Difference]: Finished difference Result 442 states and 521 transitions. [2022-12-14 07:22:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-12-14 07:22:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:49,159 INFO L225 Difference]: With dead ends: 442 [2022-12-14 07:22:49,159 INFO L226 Difference]: Without dead ends: 442 [2022-12-14 07:22:49,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:49,161 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 385 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:49,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 267 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-12-14 07:22:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 236. [2022-12-14 07:22:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 2.018633540372671) internal successors, (325), 225 states have internal predecessors, (325), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:49,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 341 transitions. [2022-12-14 07:22:49,169 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 341 transitions. Word has length 10 [2022-12-14 07:22:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:49,169 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 341 transitions. [2022-12-14 07:22:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 341 transitions. [2022-12-14 07:22:49,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:22:49,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:49,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:49,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 07:22:49,170 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:49,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1412186603, now seen corresponding path program 1 times [2022-12-14 07:22:49,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:49,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443567219] [2022-12-14 07:22:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:49,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:49,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:49,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443567219] [2022-12-14 07:22:49,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443567219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:49,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:49,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:49,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015057694] [2022-12-14 07:22:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:49,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:49,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:49,348 INFO L87 Difference]: Start difference. First operand 236 states and 341 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:49,951 INFO L93 Difference]: Finished difference Result 535 states and 656 transitions. [2022-12-14 07:22:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:22:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-12-14 07:22:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:49,954 INFO L225 Difference]: With dead ends: 535 [2022-12-14 07:22:49,954 INFO L226 Difference]: Without dead ends: 535 [2022-12-14 07:22:49,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:22:49,955 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 503 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:49,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 351 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:22:49,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-12-14 07:22:49,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 250. [2022-12-14 07:22:49,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 175 states have (on average 2.0228571428571427) internal successors, (354), 239 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:49,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2022-12-14 07:22:49,963 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 10 [2022-12-14 07:22:49,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:49,963 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2022-12-14 07:22:49,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:49,963 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2022-12-14 07:22:49,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:22:49,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:49,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:49,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 07:22:49,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 276163622, now seen corresponding path program 1 times [2022-12-14 07:22:49,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:49,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286035318] [2022-12-14 07:22:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:50,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:50,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:50,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286035318] [2022-12-14 07:22:50,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286035318] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:50,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:50,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:22:50,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815955058] [2022-12-14 07:22:50,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:50,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:50,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:50,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:50,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:50,007 INFO L87 Difference]: Start difference. First operand 250 states and 370 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:50,229 INFO L93 Difference]: Finished difference Result 446 states and 588 transitions. [2022-12-14 07:22:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:22:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 07:22:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:50,232 INFO L225 Difference]: With dead ends: 446 [2022-12-14 07:22:50,232 INFO L226 Difference]: Without dead ends: 446 [2022-12-14 07:22:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:50,233 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 250 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:50,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 264 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:50,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-12-14 07:22:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 256. [2022-12-14 07:22:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.988950276243094) internal successors, (360), 245 states have internal predecessors, (360), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2022-12-14 07:22:50,243 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 12 [2022-12-14 07:22:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2022-12-14 07:22:50,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2022-12-14 07:22:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:22:50,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:50,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 07:22:50,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash 276163623, now seen corresponding path program 1 times [2022-12-14 07:22:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:50,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036559267] [2022-12-14 07:22:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:50,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:50,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036559267] [2022-12-14 07:22:50,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036559267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:50,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:50,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:22:50,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419170338] [2022-12-14 07:22:50,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:50,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:50,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:50,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:50,355 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:50,535 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2022-12-14 07:22:50,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:22:50,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 07:22:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:50,536 INFO L225 Difference]: With dead ends: 298 [2022-12-14 07:22:50,536 INFO L226 Difference]: Without dead ends: 298 [2022-12-14 07:22:50,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:50,537 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 142 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:50,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 262 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-14 07:22:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2022-12-14 07:22:50,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.9558011049723756) internal successors, (354), 245 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 07:22:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 370 transitions. [2022-12-14 07:22:50,542 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 370 transitions. Word has length 12 [2022-12-14 07:22:50,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:50,542 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 370 transitions. [2022-12-14 07:22:50,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 370 transitions. [2022-12-14 07:22:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 07:22:50,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:50,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:50,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 07:22:50,543 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1238758409, now seen corresponding path program 1 times [2022-12-14 07:22:50,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:50,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130734262] [2022-12-14 07:22:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:50,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:50,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130734262] [2022-12-14 07:22:50,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130734262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:50,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:50,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271349074] [2022-12-14 07:22:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:50,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:50,708 INFO L87 Difference]: Start difference. First operand 256 states and 370 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:50,925 INFO L93 Difference]: Finished difference Result 340 states and 463 transitions. [2022-12-14 07:22:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:22:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 07:22:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:50,927 INFO L225 Difference]: With dead ends: 340 [2022-12-14 07:22:50,927 INFO L226 Difference]: Without dead ends: 340 [2022-12-14 07:22:50,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:22:50,928 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:50,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 636 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-12-14 07:22:50,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 296. [2022-12-14 07:22:50,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 218 states have (on average 1.9036697247706422) internal successors, (415), 281 states have internal predecessors, (415), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:50,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 435 transitions. [2022-12-14 07:22:50,938 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 435 transitions. Word has length 13 [2022-12-14 07:22:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:50,938 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 435 transitions. [2022-12-14 07:22:50,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 435 transitions. [2022-12-14 07:22:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:22:50,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:50,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 07:22:50,939 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 253482522, now seen corresponding path program 1 times [2022-12-14 07:22:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:50,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104378807] [2022-12-14 07:22:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:50,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:50,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:50,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104378807] [2022-12-14 07:22:50,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104378807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:50,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:50,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:22:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526071783] [2022-12-14 07:22:50,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:22:50,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:22:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:50,979 INFO L87 Difference]: Start difference. First operand 296 states and 435 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:51,076 INFO L93 Difference]: Finished difference Result 370 states and 511 transitions. [2022-12-14 07:22:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:22:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 07:22:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:51,079 INFO L225 Difference]: With dead ends: 370 [2022-12-14 07:22:51,079 INFO L226 Difference]: Without dead ends: 370 [2022-12-14 07:22:51,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:22:51,080 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:51,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 180 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-14 07:22:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 293. [2022-12-14 07:22:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.8623853211009174) internal successors, (406), 278 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-12-14 07:22:51,087 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 14 [2022-12-14 07:22:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:51,087 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-12-14 07:22:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-12-14 07:22:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:22:51,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:51,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 07:22:51,088 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash 253482523, now seen corresponding path program 1 times [2022-12-14 07:22:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647147165] [2022-12-14 07:22:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:51,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:51,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647147165] [2022-12-14 07:22:51,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647147165] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:51,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:51,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:22:51,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383212875] [2022-12-14 07:22:51,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:51,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:51,258 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:51,465 INFO L93 Difference]: Finished difference Result 324 states and 425 transitions. [2022-12-14 07:22:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:22:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 07:22:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:51,467 INFO L225 Difference]: With dead ends: 324 [2022-12-14 07:22:51,467 INFO L226 Difference]: Without dead ends: 324 [2022-12-14 07:22:51,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:22:51,468 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 457 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:51,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 414 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:51,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-12-14 07:22:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-12-14 07:22:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 218 states have (on average 1.834862385321101) internal successors, (400), 276 states have internal predecessors, (400), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 420 transitions. [2022-12-14 07:22:51,475 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 420 transitions. Word has length 14 [2022-12-14 07:22:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:51,475 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 420 transitions. [2022-12-14 07:22:51,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 420 transitions. [2022-12-14 07:22:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:22:51,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:51,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 07:22:51,477 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -699623153, now seen corresponding path program 1 times [2022-12-14 07:22:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:51,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940521773] [2022-12-14 07:22:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:51,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:51,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:51,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940521773] [2022-12-14 07:22:51,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940521773] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:51,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:51,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623410490] [2022-12-14 07:22:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:51,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:51,708 INFO L87 Difference]: Start difference. First operand 291 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:52,112 INFO L93 Difference]: Finished difference Result 541 states and 742 transitions. [2022-12-14 07:22:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:22:52,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-12-14 07:22:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:52,115 INFO L225 Difference]: With dead ends: 541 [2022-12-14 07:22:52,115 INFO L226 Difference]: Without dead ends: 539 [2022-12-14 07:22:52,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:22:52,116 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 304 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:52,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 747 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:22:52,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-12-14 07:22:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 285. [2022-12-14 07:22:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 212 states have (on average 1.8349056603773586) internal successors, (389), 270 states have internal predecessors, (389), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 409 transitions. [2022-12-14 07:22:52,125 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 409 transitions. Word has length 16 [2022-12-14 07:22:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:52,125 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 409 transitions. [2022-12-14 07:22:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 409 transitions. [2022-12-14 07:22:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:22:52,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:52,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:52,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 07:22:52,127 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1216429507, now seen corresponding path program 1 times [2022-12-14 07:22:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:52,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827720248] [2022-12-14 07:22:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:52,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:52,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827720248] [2022-12-14 07:22:52,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827720248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:52,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:52,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:22:52,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065771278] [2022-12-14 07:22:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:52,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:52,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:52,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:52,303 INFO L87 Difference]: Start difference. First operand 285 states and 409 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:52,504 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2022-12-14 07:22:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:22:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-12-14 07:22:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:52,505 INFO L225 Difference]: With dead ends: 317 [2022-12-14 07:22:52,505 INFO L226 Difference]: Without dead ends: 317 [2022-12-14 07:22:52,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:22:52,506 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 321 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:52,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 461 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-12-14 07:22:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 284. [2022-12-14 07:22:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 212 states have (on average 1.820754716981132) internal successors, (386), 269 states have internal predecessors, (386), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 406 transitions. [2022-12-14 07:22:52,512 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 406 transitions. Word has length 16 [2022-12-14 07:22:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:52,513 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 406 transitions. [2022-12-14 07:22:52,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 406 transitions. [2022-12-14 07:22:52,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:22:52,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:52,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:52,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 07:22:52,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1216429700, now seen corresponding path program 1 times [2022-12-14 07:22:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610148466] [2022-12-14 07:22:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:52,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:52,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610148466] [2022-12-14 07:22:52,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610148466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:52,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:52,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903991031] [2022-12-14 07:22:52,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:52,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:52,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:52,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:52,583 INFO L87 Difference]: Start difference. First operand 284 states and 406 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:52,721 INFO L93 Difference]: Finished difference Result 436 states and 593 transitions. [2022-12-14 07:22:52,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:22:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-12-14 07:22:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:52,722 INFO L225 Difference]: With dead ends: 436 [2022-12-14 07:22:52,722 INFO L226 Difference]: Without dead ends: 436 [2022-12-14 07:22:52,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:52,723 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 121 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:52,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 425 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-12-14 07:22:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 302. [2022-12-14 07:22:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 230 states have (on average 1.7652173913043478) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 426 transitions. [2022-12-14 07:22:52,729 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 426 transitions. Word has length 16 [2022-12-14 07:22:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:52,729 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 426 transitions. [2022-12-14 07:22:52,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 426 transitions. [2022-12-14 07:22:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:22:52,729 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:52,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:52,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 07:22:52,730 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:52,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:52,730 INFO L85 PathProgramCache]: Analyzing trace with hash -213121201, now seen corresponding path program 1 times [2022-12-14 07:22:52,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185162600] [2022-12-14 07:22:52,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:52,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:52,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185162600] [2022-12-14 07:22:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185162600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:52,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:52,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:22:52,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580154820] [2022-12-14 07:22:52,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:52,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:52,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:52,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:52,770 INFO L87 Difference]: Start difference. First operand 302 states and 426 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:52,965 INFO L93 Difference]: Finished difference Result 492 states and 634 transitions. [2022-12-14 07:22:52,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:22:52,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-14 07:22:52,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:52,968 INFO L225 Difference]: With dead ends: 492 [2022-12-14 07:22:52,968 INFO L226 Difference]: Without dead ends: 492 [2022-12-14 07:22:52,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:52,969 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 223 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:52,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 260 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-12-14 07:22:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 318. [2022-12-14 07:22:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7967479674796747) internal successors, (442), 303 states have internal predecessors, (442), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 462 transitions. [2022-12-14 07:22:52,975 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 462 transitions. Word has length 17 [2022-12-14 07:22:52,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:52,975 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 462 transitions. [2022-12-14 07:22:52,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:52,975 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 462 transitions. [2022-12-14 07:22:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:22:52,976 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:52,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:52,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 07:22:52,976 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:52,976 INFO L85 PathProgramCache]: Analyzing trace with hash -213121200, now seen corresponding path program 1 times [2022-12-14 07:22:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:52,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530863388] [2022-12-14 07:22:52,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:52,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:53,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:53,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530863388] [2022-12-14 07:22:53,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530863388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:53,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:53,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:53,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74714859] [2022-12-14 07:22:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:53,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:53,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:53,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:53,073 INFO L87 Difference]: Start difference. First operand 318 states and 462 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:53,280 INFO L93 Difference]: Finished difference Result 356 states and 470 transitions. [2022-12-14 07:22:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:22:53,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-14 07:22:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:53,282 INFO L225 Difference]: With dead ends: 356 [2022-12-14 07:22:53,282 INFO L226 Difference]: Without dead ends: 356 [2022-12-14 07:22:53,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:53,283 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 135 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:53,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 323 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-12-14 07:22:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 318. [2022-12-14 07:22:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7601626016260163) internal successors, (433), 303 states have internal predecessors, (433), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2022-12-14 07:22:53,291 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 17 [2022-12-14 07:22:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:53,291 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2022-12-14 07:22:53,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2022-12-14 07:22:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:22:53,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:53,292 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] [2022-12-14 07:22:53,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 07:22:53,292 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1131849907, now seen corresponding path program 1 times [2022-12-14 07:22:53,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:53,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043374196] [2022-12-14 07:22:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:53,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:53,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043374196] [2022-12-14 07:22:53,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043374196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:53,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:53,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:53,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081016315] [2022-12-14 07:22:53,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:53,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:22:53,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:53,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:22:53,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:22:53,431 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:53,743 INFO L93 Difference]: Finished difference Result 479 states and 649 transitions. [2022-12-14 07:22:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:22:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-14 07:22:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:53,745 INFO L225 Difference]: With dead ends: 479 [2022-12-14 07:22:53,745 INFO L226 Difference]: Without dead ends: 479 [2022-12-14 07:22:53,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:22:53,746 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 385 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:53,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 731 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-12-14 07:22:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 315. [2022-12-14 07:22:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.7195121951219512) internal successors, (423), 300 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 443 transitions. [2022-12-14 07:22:53,755 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 443 transitions. Word has length 20 [2022-12-14 07:22:53,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:53,755 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 443 transitions. [2022-12-14 07:22:53,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 443 transitions. [2022-12-14 07:22:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:22:53,756 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:53,756 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] [2022-12-14 07:22:53,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 07:22:53,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:53,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2046372082, now seen corresponding path program 1 times [2022-12-14 07:22:53,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:53,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528021252] [2022-12-14 07:22:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:53,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:53,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528021252] [2022-12-14 07:22:53,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528021252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:53,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:53,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:53,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103908735] [2022-12-14 07:22:53,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:53,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:53,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:53,828 INFO L87 Difference]: Start difference. First operand 315 states and 443 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:53,980 INFO L93 Difference]: Finished difference Result 388 states and 523 transitions. [2022-12-14 07:22:53,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-14 07:22:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:53,981 INFO L225 Difference]: With dead ends: 388 [2022-12-14 07:22:53,982 INFO L226 Difference]: Without dead ends: 388 [2022-12-14 07:22:53,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:53,982 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 301 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:53,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 286 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-12-14 07:22:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 314. [2022-12-14 07:22:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.7113821138211383) internal successors, (421), 299 states have internal predecessors, (421), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 441 transitions. [2022-12-14 07:22:53,990 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 441 transitions. Word has length 20 [2022-12-14 07:22:53,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:53,990 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 441 transitions. [2022-12-14 07:22:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:53,990 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 441 transitions. [2022-12-14 07:22:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:22:53,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:53,991 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] [2022-12-14 07:22:53,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 07:22:53,991 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:53,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2046372081, now seen corresponding path program 1 times [2022-12-14 07:22:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:53,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411814792] [2022-12-14 07:22:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:54,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:54,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411814792] [2022-12-14 07:22:54,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411814792] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:54,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:54,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223355192] [2022-12-14 07:22:54,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:54,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:54,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:54,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:54,125 INFO L87 Difference]: Start difference. First operand 314 states and 441 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:54,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:54,281 INFO L93 Difference]: Finished difference Result 338 states and 441 transitions. [2022-12-14 07:22:54,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:54,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-12-14 07:22:54,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:54,282 INFO L225 Difference]: With dead ends: 338 [2022-12-14 07:22:54,282 INFO L226 Difference]: Without dead ends: 338 [2022-12-14 07:22:54,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:54,283 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 324 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:54,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 302 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:54,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-14 07:22:54,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 313. [2022-12-14 07:22:54,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 246 states have (on average 1.7032520325203253) internal successors, (419), 298 states have internal predecessors, (419), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2022-12-14 07:22:54,287 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 20 [2022-12-14 07:22:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:54,288 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2022-12-14 07:22:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2022-12-14 07:22:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:22:54,288 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:54,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:54,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 07:22:54,288 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash -727605802, now seen corresponding path program 1 times [2022-12-14 07:22:54,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:54,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305386358] [2022-12-14 07:22:54,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:54,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:54,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:54,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305386358] [2022-12-14 07:22:54,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305386358] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:54,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:54,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:22:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781842778] [2022-12-14 07:22:54,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:54,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:54,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:54,496 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:54,779 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-12-14 07:22:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:22:54,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-12-14 07:22:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:54,782 INFO L225 Difference]: With dead ends: 350 [2022-12-14 07:22:54,782 INFO L226 Difference]: Without dead ends: 350 [2022-12-14 07:22:54,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:22:54,782 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:54,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 500 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:54,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-12-14 07:22:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 309. [2022-12-14 07:22:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6900826446280992) internal successors, (409), 294 states have internal predecessors, (409), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 429 transitions. [2022-12-14 07:22:54,787 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 429 transitions. Word has length 21 [2022-12-14 07:22:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:54,787 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 429 transitions. [2022-12-14 07:22:54,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 429 transitions. [2022-12-14 07:22:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:22:54,788 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:54,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 07:22:54,788 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -727631402, now seen corresponding path program 1 times [2022-12-14 07:22:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268941078] [2022-12-14 07:22:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:54,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:54,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268941078] [2022-12-14 07:22:54,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268941078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:54,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:54,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:54,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259436552] [2022-12-14 07:22:54,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:54,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:54,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:54,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:54,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:54,887 INFO L87 Difference]: Start difference. First operand 309 states and 429 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:55,050 INFO L93 Difference]: Finished difference Result 349 states and 460 transitions. [2022-12-14 07:22:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:22:55,051 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-12-14 07:22:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:55,052 INFO L225 Difference]: With dead ends: 349 [2022-12-14 07:22:55,052 INFO L226 Difference]: Without dead ends: 349 [2022-12-14 07:22:55,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:55,053 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:55,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 407 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:55,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-12-14 07:22:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 309. [2022-12-14 07:22:55,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6859504132231404) internal successors, (408), 294 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 07:22:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 428 transitions. [2022-12-14 07:22:55,060 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 428 transitions. Word has length 21 [2022-12-14 07:22:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:55,060 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 428 transitions. [2022-12-14 07:22:55,060 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 428 transitions. [2022-12-14 07:22:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:22:55,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:55,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 07:22:55,061 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1081736724, now seen corresponding path program 1 times [2022-12-14 07:22:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:55,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419635078] [2022-12-14 07:22:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:55,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:55,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419635078] [2022-12-14 07:22:55,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419635078] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:55,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:55,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:55,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371313048] [2022-12-14 07:22:55,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:55,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:55,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:55,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:55,195 INFO L87 Difference]: Start difference. First operand 309 states and 428 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:55,371 INFO L93 Difference]: Finished difference Result 404 states and 535 transitions. [2022-12-14 07:22:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:55,372 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 07:22:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:55,374 INFO L225 Difference]: With dead ends: 404 [2022-12-14 07:22:55,374 INFO L226 Difference]: Without dead ends: 404 [2022-12-14 07:22:55,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:55,374 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 138 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:55,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 381 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-14 07:22:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 340. [2022-12-14 07:22:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 270 states have (on average 1.6703703703703703) internal successors, (451), 323 states have internal predecessors, (451), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:22:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 475 transitions. [2022-12-14 07:22:55,379 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 475 transitions. Word has length 22 [2022-12-14 07:22:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:55,379 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 475 transitions. [2022-12-14 07:22:55,380 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,380 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 475 transitions. [2022-12-14 07:22:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:22:55,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:55,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:55,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:22:55,380 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash 531454447, now seen corresponding path program 1 times [2022-12-14 07:22:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:55,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984348423] [2022-12-14 07:22:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:55,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:55,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:55,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984348423] [2022-12-14 07:22:55,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984348423] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:55,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:55,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:22:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910358178] [2022-12-14 07:22:55,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:55,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:22:55,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:22:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:55,431 INFO L87 Difference]: Start difference. First operand 340 states and 475 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:55,656 INFO L93 Difference]: Finished difference Result 645 states and 833 transitions. [2022-12-14 07:22:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:55,656 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 07:22:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:55,658 INFO L225 Difference]: With dead ends: 645 [2022-12-14 07:22:55,658 INFO L226 Difference]: Without dead ends: 645 [2022-12-14 07:22:55,659 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 [2022-12-14 07:22:55,659 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 492 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:55,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 325 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:55,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-12-14 07:22:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 337. [2022-12-14 07:22:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 270 states have (on average 1.6481481481481481) internal successors, (445), 320 states have internal predecessors, (445), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:22:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 469 transitions. [2022-12-14 07:22:55,665 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 469 transitions. Word has length 22 [2022-12-14 07:22:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:55,665 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 469 transitions. [2022-12-14 07:22:55,665 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 469 transitions. [2022-12-14 07:22:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:22:55,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:55,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:55,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:22:55,666 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:55,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 531454448, now seen corresponding path program 1 times [2022-12-14 07:22:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:55,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125949143] [2022-12-14 07:22:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:55,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125949143] [2022-12-14 07:22:55,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125949143] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:55,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:55,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:55,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943396184] [2022-12-14 07:22:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:55,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:55,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:55,768 INFO L87 Difference]: Start difference. First operand 337 states and 469 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:56,023 INFO L93 Difference]: Finished difference Result 520 states and 667 transitions. [2022-12-14 07:22:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:22:56,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 07:22:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:56,026 INFO L225 Difference]: With dead ends: 520 [2022-12-14 07:22:56,026 INFO L226 Difference]: Without dead ends: 520 [2022-12-14 07:22:56,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:22:56,027 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 596 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:56,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 396 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:56,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-12-14 07:22:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 336. [2022-12-14 07:22:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6407407407407408) internal successors, (443), 319 states have internal predecessors, (443), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:22:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2022-12-14 07:22:56,032 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 22 [2022-12-14 07:22:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:56,032 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2022-12-14 07:22:56,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2022-12-14 07:22:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 07:22:56,033 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:56,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:56,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-14 07:22:56,033 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:56,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:56,034 INFO L85 PathProgramCache]: Analyzing trace with hash 531454609, now seen corresponding path program 1 times [2022-12-14 07:22:56,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:56,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330508218] [2022-12-14 07:22:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:56,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:56,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330508218] [2022-12-14 07:22:56,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330508218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:56,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:56,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:22:56,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814023947] [2022-12-14 07:22:56,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:56,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:22:56,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:22:56,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:22:56,170 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:56,438 INFO L93 Difference]: Finished difference Result 465 states and 580 transitions. [2022-12-14 07:22:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-14 07:22:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:56,439 INFO L225 Difference]: With dead ends: 465 [2022-12-14 07:22:56,439 INFO L226 Difference]: Without dead ends: 465 [2022-12-14 07:22:56,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:56,440 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 284 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:56,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 258 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-14 07:22:56,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 336. [2022-12-14 07:22:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6333333333333333) internal successors, (441), 319 states have internal predecessors, (441), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 07:22:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 465 transitions. [2022-12-14 07:22:56,445 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 465 transitions. Word has length 22 [2022-12-14 07:22:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:56,445 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 465 transitions. [2022-12-14 07:22:56,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 465 transitions. [2022-12-14 07:22:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 07:22:56,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:56,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:56,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-14 07:22:56,446 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:56,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:56,446 INFO L85 PathProgramCache]: Analyzing trace with hash -166897810, now seen corresponding path program 1 times [2022-12-14 07:22:56,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:56,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611999436] [2022-12-14 07:22:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:56,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:56,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611999436] [2022-12-14 07:22:56,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611999436] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:56,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:56,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:56,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773611778] [2022-12-14 07:22:56,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:56,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:56,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:56,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:56,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:56,568 INFO L87 Difference]: Start difference. First operand 336 states and 465 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:56,977 INFO L93 Difference]: Finished difference Result 606 states and 804 transitions. [2022-12-14 07:22:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:22:56,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-12-14 07:22:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:56,979 INFO L225 Difference]: With dead ends: 606 [2022-12-14 07:22:56,979 INFO L226 Difference]: Without dead ends: 606 [2022-12-14 07:22:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:22:56,979 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 304 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:56,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 555 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:22:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-12-14 07:22:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 366. [2022-12-14 07:22:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.612794612794613) internal successors, (479), 347 states have internal predecessors, (479), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 07:22:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 507 transitions. [2022-12-14 07:22:56,991 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 507 transitions. Word has length 24 [2022-12-14 07:22:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:56,991 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 507 transitions. [2022-12-14 07:22:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 507 transitions. [2022-12-14 07:22:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 07:22:56,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:56,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:56,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-14 07:22:56,992 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash -878864550, now seen corresponding path program 1 times [2022-12-14 07:22:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518296594] [2022-12-14 07:22:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:56,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:57,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:57,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518296594] [2022-12-14 07:22:57,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518296594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:57,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:57,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:57,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381303770] [2022-12-14 07:22:57,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:57,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:57,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:57,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:57,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:57,105 INFO L87 Difference]: Start difference. First operand 366 states and 507 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:57,350 INFO L93 Difference]: Finished difference Result 408 states and 527 transitions. [2022-12-14 07:22:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:22:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-14 07:22:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:57,351 INFO L225 Difference]: With dead ends: 408 [2022-12-14 07:22:57,351 INFO L226 Difference]: Without dead ends: 408 [2022-12-14 07:22:57,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:22:57,352 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 248 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:57,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 326 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-12-14 07:22:57,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2022-12-14 07:22:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.5993265993265993) internal successors, (475), 347 states have internal predecessors, (475), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 07:22:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 503 transitions. [2022-12-14 07:22:57,358 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 503 transitions. Word has length 25 [2022-12-14 07:22:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:57,358 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 503 transitions. [2022-12-14 07:22:57,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:22:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 503 transitions. [2022-12-14 07:22:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:22:57,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:57,359 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:57,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-14 07:22:57,359 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:57,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:57,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1974938871, now seen corresponding path program 1 times [2022-12-14 07:22:57,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:57,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981871419] [2022-12-14 07:22:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:22:57,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:57,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981871419] [2022-12-14 07:22:57,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981871419] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:57,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:57,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:22:57,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679143990] [2022-12-14 07:22:57,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:57,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:22:57,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:57,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:22:57,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:22:57,502 INFO L87 Difference]: Start difference. First operand 366 states and 503 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:22:57,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:57,712 INFO L93 Difference]: Finished difference Result 438 states and 566 transitions. [2022-12-14 07:22:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:22:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-12-14 07:22:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:57,714 INFO L225 Difference]: With dead ends: 438 [2022-12-14 07:22:57,714 INFO L226 Difference]: Without dead ends: 438 [2022-12-14 07:22:57,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:22:57,715 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 307 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:57,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 233 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:22:57,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-12-14 07:22:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 363. [2022-12-14 07:22:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 297 states have (on average 1.5824915824915824) internal successors, (470), 344 states have internal predecessors, (470), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-12-14 07:22:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2022-12-14 07:22:57,723 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 33 [2022-12-14 07:22:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:57,723 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2022-12-14 07:22:57,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:22:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2022-12-14 07:22:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 07:22:57,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:57,724 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:57,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-14 07:22:57,724 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:22:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash 971914244, now seen corresponding path program 1 times [2022-12-14 07:22:57,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:57,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214276597] [2022-12-14 07:22:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:57,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:22:57,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214276597] [2022-12-14 07:22:57,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214276597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:22:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805389375] [2022-12-14 07:22:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:57,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:22:57,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:22:57,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:22:57,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:22:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:22:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:22:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:22:58,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:22:58,084 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 07:22:58,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 07:22:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:22:58,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805389375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:22:58,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620974504] [2022-12-14 07:22:58,117 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 07:22:58,118 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:22:58,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:22:58,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:22:58,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:22:58,802 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-12-14 07:22:58,806 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:23:00,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [620974504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:00,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:23:00,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-12-14 07:23:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231348686] [2022-12-14 07:23:00,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:23:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:23:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:23:00,460 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:00,845 INFO L93 Difference]: Finished difference Result 390 states and 529 transitions. [2022-12-14 07:23:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:23:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-12-14 07:23:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:00,846 INFO L225 Difference]: With dead ends: 390 [2022-12-14 07:23:00,846 INFO L226 Difference]: Without dead ends: 390 [2022-12-14 07:23:00,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-12-14 07:23:00,846 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 38 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:00,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 193 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:23:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-14 07:23:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 376. [2022-12-14 07:23:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 309 states have (on average 1.5663430420711975) internal successors, (484), 356 states have internal predecessors, (484), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 07:23:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 514 transitions. [2022-12-14 07:23:00,851 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 514 transitions. Word has length 34 [2022-12-14 07:23:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:00,851 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 514 transitions. [2022-12-14 07:23:00,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 514 transitions. [2022-12-14 07:23:00,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 07:23:00,851 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:00,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:00,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:23:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:01,052 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:01,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1876821989, now seen corresponding path program 1 times [2022-12-14 07:23:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:01,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872676869] [2022-12-14 07:23:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:01,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:01,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872676869] [2022-12-14 07:23:01,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872676869] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:01,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:01,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:23:01,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183326710] [2022-12-14 07:23:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:23:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:23:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:23:01,221 INFO L87 Difference]: Start difference. First operand 376 states and 514 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:01,431 INFO L93 Difference]: Finished difference Result 399 states and 514 transitions. [2022-12-14 07:23:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:23:01,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-12-14 07:23:01,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:01,432 INFO L225 Difference]: With dead ends: 399 [2022-12-14 07:23:01,432 INFO L226 Difference]: Without dead ends: 399 [2022-12-14 07:23:01,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:23:01,432 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 212 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:01,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 269 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:23:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-12-14 07:23:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 375. [2022-12-14 07:23:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 309 states have (on average 1.5598705501618122) internal successors, (482), 355 states have internal predecessors, (482), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 07:23:01,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 512 transitions. [2022-12-14 07:23:01,436 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 512 transitions. Word has length 33 [2022-12-14 07:23:01,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:01,437 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 512 transitions. [2022-12-14 07:23:01,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 512 transitions. [2022-12-14 07:23:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 07:23:01,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:01,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:01,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 07:23:01,437 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:01,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:01,438 INFO L85 PathProgramCache]: Analyzing trace with hash -116333273, now seen corresponding path program 1 times [2022-12-14 07:23:01,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:01,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685149839] [2022-12-14 07:23:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:01,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:02,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:02,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685149839] [2022-12-14 07:23:02,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685149839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:02,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670525761] [2022-12-14 07:23:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:02,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:02,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:02,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:02,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:23:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-14 07:23:02,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:02,349 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:23:02,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:23:02,433 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 15 treesize of output 11 [2022-12-14 07:23:02,440 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 15 treesize of output 11 [2022-12-14 07:23:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:02,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 07:23:02,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 07:23:02,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:23:02,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:23:02,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-14 07:23:02,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-14 07:23:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:02,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:23:02,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670525761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:02,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:23:02,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2022-12-14 07:23:02,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434890187] [2022-12-14 07:23:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:02,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:23:02,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:02,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:23:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:23:02,592 INFO L87 Difference]: Start difference. First operand 375 states and 512 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:03,137 INFO L93 Difference]: Finished difference Result 581 states and 711 transitions. [2022-12-14 07:23:03,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 07:23:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-12-14 07:23:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:03,138 INFO L225 Difference]: With dead ends: 581 [2022-12-14 07:23:03,138 INFO L226 Difference]: Without dead ends: 581 [2022-12-14 07:23:03,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-12-14 07:23:03,139 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 418 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:03,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1114 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:23:03,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-12-14 07:23:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 378. [2022-12-14 07:23:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 312 states have (on average 1.5544871794871795) internal successors, (485), 358 states have internal predecessors, (485), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 07:23:03,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 515 transitions. [2022-12-14 07:23:03,146 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 515 transitions. Word has length 34 [2022-12-14 07:23:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:03,146 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 515 transitions. [2022-12-14 07:23:03,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 515 transitions. [2022-12-14 07:23:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 07:23:03,147 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:03,147 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:03,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:23:03,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 07:23:03,348 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash -537756030, now seen corresponding path program 1 times [2022-12-14 07:23:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:03,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250284802] [2022-12-14 07:23:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:03,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:04,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:04,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250284802] [2022-12-14 07:23:04,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250284802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:04,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115712321] [2022-12-14 07:23:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:04,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:04,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:23:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:04,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 07:23:04,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:04,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:04,520 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 15 treesize of output 11 [2022-12-14 07:23:04,628 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-12-14 07:23:04,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-12-14 07:23:04,656 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 21 treesize of output 9 [2022-12-14 07:23:04,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:04,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:04,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115712321] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:04,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [750514600] [2022-12-14 07:23:04,771 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 07:23:04,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:23:04,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:23:04,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:23:04,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:23:04,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:04,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:04,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 07:23:05,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:05,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:05,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:05,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-12-14 07:23:05,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:05,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:05,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:05,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 07:23:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 07:23:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:05,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:05,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:05,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:05,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:05,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:05,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:05,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:05,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:06,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:06,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 07:23:06,164 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 23 treesize of output 1 [2022-12-14 07:23:06,186 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:06,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:06,210 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:06,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:06,294 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 15 treesize of output 11 [2022-12-14 07:23:06,304 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 23 treesize of output 1 [2022-12-14 07:23:06,314 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 15 treesize of output 11 [2022-12-14 07:23:06,393 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:06,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:06,407 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 13 treesize of output 9 [2022-12-14 07:23:06,427 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:06,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:06,545 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:06,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:06,576 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 07:23:06,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 07:23:06,605 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:06,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:06,704 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-12-14 07:23:06,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:23:11,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23456#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (= |~#list~0.offset| 0) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (= |ULTIMATE.start_main_~y~1#1| 0) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (= 3 |~#list~0.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (not (= (select |#valid| |ULTIMATE.start_create_item_#t~mem7#1.base|) 1)) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (= |ULTIMATE.start_main_~z~0#1| 0) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (= |#NULL.base| 0) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-12-14 07:23:11,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:23:11,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:23:11,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2022-12-14 07:23:11,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064406898] [2022-12-14 07:23:11,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:23:11,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 07:23:11,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:11,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 07:23:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 07:23:11,958 INFO L87 Difference]: Start difference. First operand 378 states and 515 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:13,634 INFO L93 Difference]: Finished difference Result 632 states and 820 transitions. [2022-12-14 07:23:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:23:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2022-12-14 07:23:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:13,636 INFO L225 Difference]: With dead ends: 632 [2022-12-14 07:23:13,636 INFO L226 Difference]: Without dead ends: 632 [2022-12-14 07:23:13,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 07:23:13,637 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 725 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:13,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1321 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 07:23:13,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-12-14 07:23:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 445. [2022-12-14 07:23:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 373 states have (on average 1.522788203753351) internal successors, (568), 419 states have internal predecessors, (568), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-12-14 07:23:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2022-12-14 07:23:13,643 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 35 [2022-12-14 07:23:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:13,643 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2022-12-14 07:23:13,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2022-12-14 07:23:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 07:23:13,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:13,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:13,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:23:13,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:13,844 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:13,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1804101776, now seen corresponding path program 1 times [2022-12-14 07:23:13,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:13,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071259765] [2022-12-14 07:23:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:13,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:14,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071259765] [2022-12-14 07:23:14,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071259765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:14,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52052704] [2022-12-14 07:23:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:14,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:14,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:14,758 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:14,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:23:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 93 conjunts are in the unsatisfiable core [2022-12-14 07:23:14,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:14,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:15,124 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 15 treesize of output 11 [2022-12-14 07:23:15,132 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 15 treesize of output 11 [2022-12-14 07:23:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:15,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:15,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 40 [2022-12-14 07:23:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:15,286 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 27 treesize of output 26 [2022-12-14 07:23:15,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:15,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:23:15,506 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-12-14 07:23:15,506 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 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-14 07:23:15,553 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 19 treesize of output 7 [2022-12-14 07:23:15,555 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 31 treesize of output 13 [2022-12-14 07:23:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:16,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52052704] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:16,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240030351] [2022-12-14 07:23:16,053 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-12-14 07:23:16,053 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:23:16,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:23:16,053 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:23:16,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:23:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 07:23:16,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:16,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:16,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:16,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-12-14 07:23:16,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:16,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 07:23:16,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:16,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 07:23:16,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:16,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:16,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:16,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:16,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:16,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:16,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:17,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:17,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-12-14 07:23:17,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:17,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-12-14 07:23:17,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 07:23:17,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:17,428 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:17,428 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 07:23:17,456 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:17,456 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 1 case distinctions, treesize of input 30 treesize of output 25 [2022-12-14 07:23:17,474 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 23 treesize of output 1 [2022-12-14 07:23:17,512 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 23 treesize of output 1 [2022-12-14 07:23:17,556 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:17,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2022-12-14 07:23:17,600 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:17,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 07:23:17,690 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:17,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:17,757 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:17,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:17,783 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 13 treesize of output 9 [2022-12-14 07:23:17,788 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 07:23:17,792 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 07:23:18,243 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 15 treesize of output 1 [2022-12-14 07:23:18,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:18,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:18,756 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 15 treesize of output 11 [2022-12-14 07:23:18,769 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 15 treesize of output 11 [2022-12-14 07:23:18,785 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 23 treesize of output 1 [2022-12-14 07:23:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:18,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:18,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:18,857 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 23 treesize of output 1 [2022-12-14 07:23:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:18,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-12-14 07:23:19,196 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:23:19,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 07:23:19,419 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 23 treesize of output 1 [2022-12-14 07:23:19,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-12-14 07:23:19,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 49 [2022-12-14 07:23:19,541 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 23 treesize of output 1 [2022-12-14 07:23:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 54 [2022-12-14 07:23:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 57 [2022-12-14 07:23:19,628 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 13 treesize of output 9 [2022-12-14 07:23:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2022-12-14 07:23:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2022-12-14 07:23:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-12-14 07:23:19,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:19,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-12-14 07:23:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:19,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 07:23:19,943 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 23 treesize of output 1 [2022-12-14 07:23:19,950 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 15 treesize of output 11 [2022-12-14 07:23:19,959 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 15 treesize of output 11 [2022-12-14 07:23:20,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:20,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:20,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:20,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:20,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:20,041 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 23 treesize of output 1 [2022-12-14 07:23:20,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 07:23:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:20,994 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:20,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:21,003 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 23 treesize of output 1 [2022-12-14 07:23:21,023 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:21,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:21,096 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 23 treesize of output 1 [2022-12-14 07:23:21,105 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 15 treesize of output 11 [2022-12-14 07:23:21,114 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 15 treesize of output 11 [2022-12-14 07:23:21,151 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 13 treesize of output 9 [2022-12-14 07:23:21,176 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:21,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:21,211 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:21,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:21,310 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 07:23:21,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 07:23:21,345 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:21,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:21,380 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:21,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:21,663 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-12-14 07:23:21,686 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:23:31,293 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24743#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (or (not (<= 0 (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset|))) (not (<= (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_#t~mem7#1.base|)))) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-12-14 07:23:31,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:23:31,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:23:31,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-12-14 07:23:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857557213] [2022-12-14 07:23:31,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 07:23:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 07:23:31,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 07:23:31,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 07:23:31,297 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:36,052 INFO L93 Difference]: Finished difference Result 1170 states and 1442 transitions. [2022-12-14 07:23:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 07:23:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-12-14 07:23:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:36,054 INFO L225 Difference]: With dead ends: 1170 [2022-12-14 07:23:36,054 INFO L226 Difference]: Without dead ends: 1170 [2022-12-14 07:23:36,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=938, Invalid=7618, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 07:23:36,056 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 3288 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3289 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:36,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3289 Valid, 1760 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 07:23:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-12-14 07:23:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 559. [2022-12-14 07:23:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 478 states have (on average 1.5397489539748954) internal successors, (736), 526 states have internal predecessors, (736), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 07:23:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 786 transitions. [2022-12-14 07:23:36,063 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 786 transitions. Word has length 36 [2022-12-14 07:23:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:36,063 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 786 transitions. [2022-12-14 07:23:36,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 786 transitions. [2022-12-14 07:23:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:23:36,064 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:36,064 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:36,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:23:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:36,265 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash -856339748, now seen corresponding path program 1 times [2022-12-14 07:23:36,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871148388] [2022-12-14 07:23:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:36,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:36,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871148388] [2022-12-14 07:23:36,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871148388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:36,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235232122] [2022-12-14 07:23:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:36,304 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:36,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:23:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:36,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:23:36,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:36,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:23:36,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235232122] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:36,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:23:36,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-14 07:23:36,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841008804] [2022-12-14 07:23:36,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:36,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:23:36,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:23:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:23:36,430 INFO L87 Difference]: Start difference. First operand 559 states and 786 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:36,490 INFO L93 Difference]: Finished difference Result 890 states and 1260 transitions. [2022-12-14 07:23:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:23:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-14 07:23:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:36,492 INFO L225 Difference]: With dead ends: 890 [2022-12-14 07:23:36,492 INFO L226 Difference]: Without dead ends: 890 [2022-12-14 07:23:36,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:23:36,493 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 234 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:36,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 260 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:23:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-12-14 07:23:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 606. [2022-12-14 07:23:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 525 states have (on average 1.5276190476190477) internal successors, (802), 573 states have internal predecessors, (802), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-12-14 07:23:36,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 852 transitions. [2022-12-14 07:23:36,500 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 852 transitions. Word has length 37 [2022-12-14 07:23:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:36,500 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 852 transitions. [2022-12-14 07:23:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 852 transitions. [2022-12-14 07:23:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:23:36,500 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:36,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:36,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:23:36,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-14 07:23:36,702 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:36,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:36,703 INFO L85 PathProgramCache]: Analyzing trace with hash -856341498, now seen corresponding path program 1 times [2022-12-14 07:23:36,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:36,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567761136] [2022-12-14 07:23:36,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:36,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:37,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567761136] [2022-12-14 07:23:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567761136] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:37,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-14 07:23:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484401560] [2022-12-14 07:23:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:37,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:23:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:23:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:23:37,138 INFO L87 Difference]: Start difference. First operand 606 states and 852 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:37,786 INFO L93 Difference]: Finished difference Result 1006 states and 1346 transitions. [2022-12-14 07:23:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:23:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-14 07:23:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:37,788 INFO L225 Difference]: With dead ends: 1006 [2022-12-14 07:23:37,788 INFO L226 Difference]: Without dead ends: 1006 [2022-12-14 07:23:37,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:23:37,788 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1006 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:37,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 669 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:23:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-12-14 07:23:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 720. [2022-12-14 07:23:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 628 states have (on average 1.5031847133757963) internal successors, (944), 679 states have internal predecessors, (944), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 24 states have call predecessors, (33), 33 states have call successors, (33) [2022-12-14 07:23:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1010 transitions. [2022-12-14 07:23:37,797 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1010 transitions. Word has length 37 [2022-12-14 07:23:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:37,797 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1010 transitions. [2022-12-14 07:23:37,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:37,797 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1010 transitions. [2022-12-14 07:23:37,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 07:23:37,797 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:37,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:37,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 07:23:37,798 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:37,798 INFO L85 PathProgramCache]: Analyzing trace with hash -856341497, now seen corresponding path program 1 times [2022-12-14 07:23:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047927944] [2022-12-14 07:23:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:37,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:38,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:38,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047927944] [2022-12-14 07:23:38,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047927944] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:38,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:38,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 07:23:38,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416382230] [2022-12-14 07:23:38,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:38,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 07:23:38,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:38,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 07:23:38,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:23:38,717 INFO L87 Difference]: Start difference. First operand 720 states and 1010 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:39,902 INFO L93 Difference]: Finished difference Result 1084 states and 1430 transitions. [2022-12-14 07:23:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:23:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-14 07:23:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:39,904 INFO L225 Difference]: With dead ends: 1084 [2022-12-14 07:23:39,904 INFO L226 Difference]: Without dead ends: 1084 [2022-12-14 07:23:39,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-12-14 07:23:39,904 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1322 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:39,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 1027 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:23:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-12-14 07:23:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 774. [2022-12-14 07:23:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 679 states have (on average 1.5139911634756995) internal successors, (1028), 731 states have internal predecessors, (1028), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-14 07:23:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1098 transitions. [2022-12-14 07:23:39,913 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1098 transitions. Word has length 37 [2022-12-14 07:23:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:39,913 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 1098 transitions. [2022-12-14 07:23:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1098 transitions. [2022-12-14 07:23:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 07:23:39,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:39,914 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 07:23:39,914 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:39,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:39,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1648644398, now seen corresponding path program 1 times [2022-12-14 07:23:39,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652067096] [2022-12-14 07:23:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:23:39,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652067096] [2022-12-14 07:23:39,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652067096] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:39,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:39,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:23:39,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167857095] [2022-12-14 07:23:39,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:39,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:23:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:23:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:23:39,983 INFO L87 Difference]: Start difference. First operand 774 states and 1098 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 07:23:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:40,043 INFO L93 Difference]: Finished difference Result 957 states and 1327 transitions. [2022-12-14 07:23:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:23:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-12-14 07:23:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:40,046 INFO L225 Difference]: With dead ends: 957 [2022-12-14 07:23:40,046 INFO L226 Difference]: Without dead ends: 957 [2022-12-14 07:23:40,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:23:40,047 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 329 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:40,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 204 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:23:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-12-14 07:23:40,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 773. [2022-12-14 07:23:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 679 states have (on average 1.5051546391752577) internal successors, (1022), 730 states have internal predecessors, (1022), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-12-14 07:23:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1092 transitions. [2022-12-14 07:23:40,054 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1092 transitions. Word has length 38 [2022-12-14 07:23:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:40,055 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1092 transitions. [2022-12-14 07:23:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 07:23:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1092 transitions. [2022-12-14 07:23:40,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:23:40,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:40,055 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:40,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 07:23:40,055 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:40,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:40,055 INFO L85 PathProgramCache]: Analyzing trace with hash -431630985, now seen corresponding path program 1 times [2022-12-14 07:23:40,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:40,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274367069] [2022-12-14 07:23:40,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:40,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:40,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:40,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274367069] [2022-12-14 07:23:40,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274367069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:40,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:40,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-14 07:23:40,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714636934] [2022-12-14 07:23:40,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:40,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:23:40,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:40,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:23:40,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:23:40,566 INFO L87 Difference]: Start difference. First operand 773 states and 1092 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:41,716 INFO L93 Difference]: Finished difference Result 1678 states and 2264 transitions. [2022-12-14 07:23:41,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 07:23:41,716 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-12-14 07:23:41,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:41,719 INFO L225 Difference]: With dead ends: 1678 [2022-12-14 07:23:41,719 INFO L226 Difference]: Without dead ends: 1674 [2022-12-14 07:23:41,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:23:41,719 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1281 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:41,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 1609 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:23:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-12-14 07:23:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 799. [2022-12-14 07:23:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5071225071225072) internal successors, (1058), 754 states have internal predecessors, (1058), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 07:23:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2022-12-14 07:23:41,730 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2022-12-14 07:23:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:41,730 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2022-12-14 07:23:41,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2022-12-14 07:23:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:23:41,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:41,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:41,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 07:23:41,731 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1217102364, now seen corresponding path program 1 times [2022-12-14 07:23:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522448538] [2022-12-14 07:23:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:23:41,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:41,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522448538] [2022-12-14 07:23:41,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522448538] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:41,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:41,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:23:41,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386210046] [2022-12-14 07:23:41,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:41,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:23:41,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:41,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:23:41,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:23:41,779 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:41,919 INFO L93 Difference]: Finished difference Result 895 states and 1261 transitions. [2022-12-14 07:23:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:23:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-12-14 07:23:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:41,921 INFO L225 Difference]: With dead ends: 895 [2022-12-14 07:23:41,921 INFO L226 Difference]: Without dead ends: 895 [2022-12-14 07:23:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:23:41,921 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 113 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:41,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 346 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:23:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-12-14 07:23:41,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 799. [2022-12-14 07:23:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5042735042735043) internal successors, (1056), 754 states have internal predecessors, (1056), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 07:23:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1130 transitions. [2022-12-14 07:23:41,929 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1130 transitions. Word has length 39 [2022-12-14 07:23:41,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:41,929 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1130 transitions. [2022-12-14 07:23:41,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1130 transitions. [2022-12-14 07:23:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:23:41,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:41,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:41,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-14 07:23:41,930 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:41,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:41,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1217102363, now seen corresponding path program 1 times [2022-12-14 07:23:41,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:41,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44597103] [2022-12-14 07:23:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:41,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:42,013 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:23:42,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:42,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44597103] [2022-12-14 07:23:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44597103] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:42,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:42,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:23:42,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984089619] [2022-12-14 07:23:42,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:42,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:23:42,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:42,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:23:42,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:23:42,014 INFO L87 Difference]: Start difference. First operand 799 states and 1130 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:42,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:42,161 INFO L93 Difference]: Finished difference Result 819 states and 1114 transitions. [2022-12-14 07:23:42,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:23:42,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-12-14 07:23:42,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:42,163 INFO L225 Difference]: With dead ends: 819 [2022-12-14 07:23:42,163 INFO L226 Difference]: Without dead ends: 819 [2022-12-14 07:23:42,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:23:42,164 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 116 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:42,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 404 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:23:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-12-14 07:23:42,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 794. [2022-12-14 07:23:42,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 701 states have (on average 1.479315263908702) internal successors, (1037), 749 states have internal predecessors, (1037), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 07:23:42,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-12-14 07:23:42,171 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 39 [2022-12-14 07:23:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:42,171 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-12-14 07:23:42,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-12-14 07:23:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 07:23:42,172 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:42,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:42,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-14 07:23:42,172 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:42,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1689575040, now seen corresponding path program 1 times [2022-12-14 07:23:42,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:42,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343263068] [2022-12-14 07:23:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:42,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:42,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:42,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343263068] [2022-12-14 07:23:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343263068] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:42,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 07:23:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865989162] [2022-12-14 07:23:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:42,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:23:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:42,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:23:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:23:42,628 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:43,439 INFO L93 Difference]: Finished difference Result 1013 states and 1333 transitions. [2022-12-14 07:23:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 07:23:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-12-14 07:23:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:43,443 INFO L225 Difference]: With dead ends: 1013 [2022-12-14 07:23:43,443 INFO L226 Difference]: Without dead ends: 1013 [2022-12-14 07:23:43,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:23:43,443 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 891 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:43,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 684 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 07:23:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-12-14 07:23:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 800. [2022-12-14 07:23:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 707 states have (on average 1.4823196605374822) internal successors, (1048), 755 states have internal predecessors, (1048), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 07:23:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1122 transitions. [2022-12-14 07:23:43,451 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1122 transitions. Word has length 39 [2022-12-14 07:23:43,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:43,451 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1122 transitions. [2022-12-14 07:23:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:23:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1122 transitions. [2022-12-14 07:23:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 07:23:43,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:43,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-12-14 07:23:43,452 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -495298584, now seen corresponding path program 1 times [2022-12-14 07:23:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:43,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675106234] [2022-12-14 07:23:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:23:43,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:43,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675106234] [2022-12-14 07:23:43,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675106234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:23:43,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:23:43,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:23:43,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868924414] [2022-12-14 07:23:43,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:23:43,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:23:43,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:43,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:23:43,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:23:43,625 INFO L87 Difference]: Start difference. First operand 800 states and 1122 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:43,878 INFO L93 Difference]: Finished difference Result 884 states and 1195 transitions. [2022-12-14 07:23:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:23:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-12-14 07:23:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:43,880 INFO L225 Difference]: With dead ends: 884 [2022-12-14 07:23:43,880 INFO L226 Difference]: Without dead ends: 884 [2022-12-14 07:23:43,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:23:43,880 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 355 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:43,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 305 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:23:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-12-14 07:23:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2022-12-14 07:23:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 707 states have (on average 1.4596888260254597) internal successors, (1032), 753 states have internal predecessors, (1032), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 07:23:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1106 transitions. [2022-12-14 07:23:43,891 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1106 transitions. Word has length 40 [2022-12-14 07:23:43,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:43,892 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1106 transitions. [2022-12-14 07:23:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 07:23:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1106 transitions. [2022-12-14 07:23:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:23:43,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:43,892 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-14 07:23:43,892 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:43,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1125515511, now seen corresponding path program 1 times [2022-12-14 07:23:43,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:43,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478862573] [2022-12-14 07:23:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:23:43,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478862573] [2022-12-14 07:23:43,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478862573] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:43,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364049976] [2022-12-14 07:23:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:43,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:43,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:43,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:43,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:23:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:44,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:23:44,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:23:44,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:44,154 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 07:23:44,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-12-14 07:23:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:23:44,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364049976] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:44,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111694758] [2022-12-14 07:23:44,171 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-12-14 07:23:44,171 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:23:44,172 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:23:44,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:23:44,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:23:44,605 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 07:23:44,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-12-14 07:23:44,963 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-12-14 07:23:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-12-14 07:23:45,162 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 13 for LOIs [2022-12-14 07:23:45,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:23:49,254 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43224#(and (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret35#1|) (= |ULTIMATE.start_main_~y~1#1| 0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret35#1|) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 07:23:49,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:23:49,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:23:49,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-12-14 07:23:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348783995] [2022-12-14 07:23:49,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:23:49,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 07:23:49,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:23:49,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 07:23:49,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:23:49,256 INFO L87 Difference]: Start difference. First operand 798 states and 1106 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:23:49,855 INFO L93 Difference]: Finished difference Result 2463 states and 3302 transitions. [2022-12-14 07:23:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:23:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-12-14 07:23:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:23:49,860 INFO L225 Difference]: With dead ends: 2463 [2022-12-14 07:23:49,860 INFO L226 Difference]: Without dead ends: 2463 [2022-12-14 07:23:49,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 07:23:49,861 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1864 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:23:49,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1866 Valid, 714 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:23:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-12-14 07:23:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1021. [2022-12-14 07:23:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 912 states have (on average 1.3980263157894737) internal successors, (1275), 957 states have internal predecessors, (1275), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (53), 37 states have call predecessors, (53), 53 states have call successors, (53) [2022-12-14 07:23:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1381 transitions. [2022-12-14 07:23:49,876 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1381 transitions. Word has length 41 [2022-12-14 07:23:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:23:49,877 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1381 transitions. [2022-12-14 07:23:49,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 07:23:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1381 transitions. [2022-12-14 07:23:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:23:49,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:23:49,877 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:23:49,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 07:23:50,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-14 07:23:50,079 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:23:50,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:23:50,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1407027637, now seen corresponding path program 1 times [2022-12-14 07:23:50,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:23:50,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768088503] [2022-12-14 07:23:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:50,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:23:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:50,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:23:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768088503] [2022-12-14 07:23:50,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768088503] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:23:50,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094989983] [2022-12-14 07:23:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:23:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:23:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:23:50,977 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:23:50,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:23:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:23:51,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 07:23:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:23:51,245 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 15 treesize of output 11 [2022-12-14 07:23:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:51,307 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 31 treesize of output 30 [2022-12-14 07:23:51,679 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 26 treesize of output 18 [2022-12-14 07:23:51,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:51,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-12-14 07:23:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:23:51,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:23:51,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:23:51,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 46 [2022-12-14 07:23:52,028 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 246 treesize of output 230 [2022-12-14 07:23:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:23:52,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094989983] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:23:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958168560] [2022-12-14 07:23:52,249 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-12-14 07:23:52,249 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:23:52,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:23:52,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:23:52,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:23:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 07:23:52,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:52,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-12-14 07:23:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-12-14 07:23:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2022-12-14 07:23:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-12-14 07:23:52,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:52,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-12-14 07:23:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2022-12-14 07:23:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-12-14 07:23:52,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-12-14 07:23:52,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:52,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:52,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:52,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:53,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-12-14 07:23:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-12-14 07:23:53,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-12-14 07:23:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:53,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:53,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-12-14 07:23:53,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:53,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 07:23:53,555 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:53,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:53,565 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 23 treesize of output 1 [2022-12-14 07:23:53,586 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:53,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:53,638 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:53,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 07:23:53,651 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 23 treesize of output 1 [2022-12-14 07:23:53,679 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:53,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 07:23:53,756 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:53,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:53,774 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 13 treesize of output 9 [2022-12-14 07:23:53,830 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:53,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:53,838 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:23:53,840 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:23:54,267 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 15 treesize of output 1 [2022-12-14 07:23:54,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:54,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:54,725 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 15 treesize of output 11 [2022-12-14 07:23:54,733 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 23 treesize of output 1 [2022-12-14 07:23:54,749 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 15 treesize of output 11 [2022-12-14 07:23:54,800 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 23 treesize of output 1 [2022-12-14 07:23:54,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:54,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:54,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:54,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:54,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:55,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-12-14 07:23:55,086 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 07:23:55,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 07:23:55,373 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:55,395 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:55,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:55,405 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 23 treesize of output 1 [2022-12-14 07:23:55,471 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:55,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 07:23:55,483 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 23 treesize of output 1 [2022-12-14 07:23:55,516 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-12-14 07:23:55,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-12-14 07:23:55,593 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:55,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:55,610 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 13 treesize of output 9 [2022-12-14 07:23:55,672 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-12-14 07:23:55,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-12-14 07:23:55,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:23:55,688 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 07:23:56,125 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 15 treesize of output 1 [2022-12-14 07:23:56,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:56,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 07:23:56,566 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 15 treesize of output 11 [2022-12-14 07:23:56,578 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 15 treesize of output 11 [2022-12-14 07:23:56,588 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 23 treesize of output 1 [2022-12-14 07:23:56,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:56,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:56,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:56,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:23:56,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:23:56,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2022-12-14 07:23:56,697 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 23 treesize of output 1 [2022-12-14 07:23:57,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 9 [2022-12-14 07:23:57,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:23:57,971 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:57,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:58,001 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-12-14 07:23:58,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 07:23:58,014 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 23 treesize of output 1 [2022-12-14 07:23:58,116 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 23 treesize of output 1 [2022-12-14 07:23:58,123 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 15 treesize of output 11 [2022-12-14 07:23:58,130 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 15 treesize of output 11 [2022-12-14 07:23:58,191 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:58,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:58,222 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-12-14 07:23:58,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-12-14 07:23:58,237 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 13 treesize of output 9 [2022-12-14 07:23:58,313 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:58,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:58,346 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 07:23:58,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-12-14 07:23:58,390 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-12-14 07:23:58,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 07:23:58,504 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-12-14 07:23:58,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:24:07,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47034#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |ULTIMATE.start_create_item_~link~0#1.base| 0))) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_create_item_~link~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4))))) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-12-14 07:24:07,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:24:07,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:24:07,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 37 [2022-12-14 07:24:07,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561662142] [2022-12-14 07:24:07,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:07,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 07:24:07,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:24:07,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 07:24:07,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3505, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 07:24:07,862 INFO L87 Difference]: Start difference. First operand 1021 states and 1381 transitions. Second operand has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:24:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:17,349 INFO L93 Difference]: Finished difference Result 3891 states and 4919 transitions. [2022-12-14 07:24:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-12-14 07:24:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-12-14 07:24:17,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:17,355 INFO L225 Difference]: With dead ends: 3891 [2022-12-14 07:24:17,355 INFO L226 Difference]: Without dead ends: 3891 [2022-12-14 07:24:17,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7824 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2652, Invalid=19998, Unknown=0, NotChecked=0, Total=22650 [2022-12-14 07:24:17,359 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 4083 mSDsluCounter, 3210 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 5015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:17,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4087 Valid, 3374 Invalid, 5015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 07:24:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2022-12-14 07:24:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 1095. [2022-12-14 07:24:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 981 states have (on average 1.4036697247706422) internal successors, (1377), 1025 states have internal predecessors, (1377), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (57), 41 states have call predecessors, (57), 57 states have call successors, (57) [2022-12-14 07:24:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1491 transitions. [2022-12-14 07:24:17,385 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1491 transitions. Word has length 41 [2022-12-14 07:24:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:17,385 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1491 transitions. [2022-12-14 07:24:17,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 07:24:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1491 transitions. [2022-12-14 07:24:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 07:24:17,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:17,385 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:24:17,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:24:17,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:17,587 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:24:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1407027638, now seen corresponding path program 1 times [2022-12-14 07:24:17,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:24:17,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096027455] [2022-12-14 07:24:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:17,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:24:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:24:17,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:24:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096027455] [2022-12-14 07:24:17,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096027455] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:24:17,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:24:17,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 07:24:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909161311] [2022-12-14 07:24:17,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:24:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:24:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:24:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:24:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:24:17,687 INFO L87 Difference]: Start difference. First operand 1095 states and 1491 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:24:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:24:17,851 INFO L93 Difference]: Finished difference Result 1644 states and 2226 transitions. [2022-12-14 07:24:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:24:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-12-14 07:24:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:24:17,854 INFO L225 Difference]: With dead ends: 1644 [2022-12-14 07:24:17,854 INFO L226 Difference]: Without dead ends: 1644 [2022-12-14 07:24:17,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:24:17,855 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 88 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:24:17,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 367 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:24:17,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2022-12-14 07:24:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1093. [2022-12-14 07:24:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 981 states have (on average 1.3883792048929664) internal successors, (1362), 1023 states have internal predecessors, (1362), 57 states have call successors, (57), 28 states have call predecessors, (57), 28 states have return successors, (57), 41 states have call predecessors, (57), 57 states have call successors, (57) [2022-12-14 07:24:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1476 transitions. [2022-12-14 07:24:17,868 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1476 transitions. Word has length 41 [2022-12-14 07:24:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:24:17,868 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 1476 transitions. [2022-12-14 07:24:17,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 07:24:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1476 transitions. [2022-12-14 07:24:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 07:24:17,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:24:17,869 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:24:17,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-14 07:24:17,869 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 07:24:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:24:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -574916057, now seen corresponding path program 1 times [2022-12-14 07:24:17,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:24:17,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833889416] [2022-12-14 07:24:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:24:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:24:20,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:24:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833889416] [2022-12-14 07:24:20,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833889416] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:24:20,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092909718] [2022-12-14 07:24:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:24:20,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:24:20,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:24:20,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:24:20,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a8073d7c-b229-46af-b143-24f622539798/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:24:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:24:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 145 conjunts are in the unsatisfiable core [2022-12-14 07:24:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:24:20,666 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 07:24:20,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 07:24:20,770 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 15 treesize of output 11 [2022-12-14 07:24:20,779 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 15 treesize of output 11 [2022-12-14 07:24:20,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:20,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-14 07:24:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:20,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-14 07:24:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:20,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 07:24:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:20,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 07:24:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:24:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-14 07:24:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-14 07:24:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 52 [2022-12-14 07:24:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:24:21,270 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 07:24:21,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2022-12-14 07:24:21,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 66 [2022-12-14 07:24:21,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:24:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:24:21,771 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 77 [2022-12-14 07:24:21,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:24:21,778 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-12-14 07:24:21,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 33 [2022-12-14 07:24:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:24:21,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:24:35,404 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-12-14 07:24:35,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 255 [2022-12-14 07:24:35,459 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-12-14 07:24:35,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 174 [2022-12-14 07:24:35,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:24:35,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 780 treesize of output 792 [2022-12-14 07:24:35,768 INFO L321 Elim1Store]: treesize reduction 152, result has 68.4 percent of original size [2022-12-14 07:24:35,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 47268 treesize of output 43718 [2022-12-14 07:24:35,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:24:36,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:24:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 353028 treesize of output 319858 [2022-12-14 07:24:38,238 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 333818 treesize of output 329522 [2022-12-14 07:24:41,804 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 4 [2022-12-14 07:24:45,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:24:45,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 362 [2022-12-14 07:28:43,034 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 827 DAG size of output: 827 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)