./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9 --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- 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-6b4ec56 [2022-11-20 20:14:37,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:14:37,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:14:37,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:14:37,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:14:37,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:14:37,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:14:37,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:14:37,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:14:37,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:14:37,386 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:14:37,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:14:37,387 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:14:37,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:14:37,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:14:37,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:14:37,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:14:37,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:14:37,394 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:14:37,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:14:37,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:14:37,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:14:37,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:14:37,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:14:37,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:14:37,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:14:37,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:14:37,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:14:37,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:14:37,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:14:37,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:14:37,416 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:14:37,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:14:37,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:14:37,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:14:37,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:14:37,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:14:37,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:14:37,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:14:37,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:14:37,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:14:37,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 20:14:37,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:14:37,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:14:37,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:14:37,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:14:37,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:14:37,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:14:37,480 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:14:37,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:14:37,480 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:14:37,481 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:14:37,482 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:14:37,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:14:37,482 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:14:37,483 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:14:37,483 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:14:37,483 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:14:37,483 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:14:37,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:14:37,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 20:14:37,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 20:14:37,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:14:37,485 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:14:37,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 20:14:37,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:14:37,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:14:37,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:14:37,487 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 20:14:37,487 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 20:14:37,487 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 20:14:37,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:14:37,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 20:14:37,488 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:14:37,488 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:14:37,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:14:37,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:14:37,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:37,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:14:37,489 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:14:37,490 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:14:37,490 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:14:37,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:14:37,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:14:37,492 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_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2022-11-20 20:14:37,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:14:37,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:14:37,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:14:37,939 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:14:37,940 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:14:37,941 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/pthread/queue_longer.i [2022-11-20 20:14:41,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:14:41,870 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:14:41,870 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i [2022-11-20 20:14:41,887 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/data/9d3de0066/34bcd0daa59a4ac9955869c15f6b9bdc/FLAGb43016b00 [2022-11-20 20:14:41,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/data/9d3de0066/34bcd0daa59a4ac9955869c15f6b9bdc [2022-11-20 20:14:41,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:14:41,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:14:41,910 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:41,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:14:41,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:14:41,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:41" (1/1) ... [2022-11-20 20:14:41,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e3bfce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:41, skipping insertion in model container [2022-11-20 20:14:41,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:14:41" (1/1) ... [2022-11-20 20:14:41,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:14:41,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:14:42,758 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-11-20 20:14:42,773 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-11-20 20:14:42,777 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-11-20 20:14:42,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:42,796 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:14:42,843 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43296,43309] [2022-11-20 20:14:42,845 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43503,43516] [2022-11-20 20:14:42,848 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/sv-benchmarks/c/pthread/queue_longer.i[43783,43796] [2022-11-20 20:14:42,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:14:42,913 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:14:42,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42 WrapperNode [2022-11-20 20:14:42,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:14:42,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:42,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:14:42,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:14:42,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:42,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:42,998 INFO L138 Inliner]: procedures = 274, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 241 [2022-11-20 20:14:42,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:14:43,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:14:43,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:14:43,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:14:43,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,078 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,084 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:14:43,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:14:43,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:14:43,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:14:43,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (1/1) ... [2022-11-20 20:14:43,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:14:43,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:14:43,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:14:43,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:14:43,213 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 20:14:43,214 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 20:14:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 20:14:43,214 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 20:14:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 20:14:43,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 20:14:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 20:14:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 20:14:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 20:14:43,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:14:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:14:43,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:14:43,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:14:43,218 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 20:14:43,469 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:14:43,472 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:14:44,374 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:14:44,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:14:44,396 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:14:44,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:44 BoogieIcfgContainer [2022-11-20 20:14:44,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:14:44,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:14:44,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:14:44,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:14:44,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:14:41" (1/3) ... [2022-11-20 20:14:44,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1a05cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:44, skipping insertion in model container [2022-11-20 20:14:44,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:14:42" (2/3) ... [2022-11-20 20:14:44,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c1a05cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:14:44, skipping insertion in model container [2022-11-20 20:14:44,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:14:44" (3/3) ... [2022-11-20 20:14:44,420 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2022-11-20 20:14:44,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:14:44,443 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2022-11-20 20:14:44,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 20:14:44,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 20:14:44,651 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 20:14:44,671 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 344 places, 352 transitions, 720 flow [2022-11-20 20:14:44,679 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 344 places, 352 transitions, 720 flow [2022-11-20 20:14:44,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 344 places, 352 transitions, 720 flow [2022-11-20 20:14:44,849 INFO L130 PetriNetUnfolder]: 15/350 cut-off events. [2022-11-20 20:14:44,850 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 20:14:44,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359 conditions, 350 events. 15/350 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 765 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 251. Up to 2 conditions per place. [2022-11-20 20:14:44,892 INFO L119 LiptonReduction]: Number of co-enabled transitions 30160 [2022-11-20 20:15:10,897 INFO L134 LiptonReduction]: Checked pairs total: 103334 [2022-11-20 20:15:10,897 INFO L136 LiptonReduction]: Total number of compositions: 589 [2022-11-20 20:15:10,908 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 139 places, 142 transitions, 300 flow [2022-11-20 20:15:11,286 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:11,309 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:15:11,318 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;@6592504d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:15:11,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2022-11-20 20:15:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 20:15:11,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:11,375 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 20:15:11,376 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:11,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1567, now seen corresponding path program 1 times [2022-11-20 20:15:11,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:11,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006026341] [2022-11-20 20:15:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:11,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:11,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:11,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:11,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006026341] [2022-11-20 20:15:11,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006026341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:11,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:11,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 20:15:11,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613232216] [2022-11-20 20:15:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 20:15:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 20:15:11,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:15:11,634 INFO L87 Difference]: Start difference. First operand has 9813 states, 7156 states have (on average 3.938932364449413) internal successors, (28187), 9812 states have internal predecessors, (28187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:11,988 INFO L93 Difference]: Finished difference Result 4512 states and 12954 transitions. [2022-11-20 20:15:12,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 20:15:12,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-20 20:15:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:12,096 INFO L225 Difference]: With dead ends: 4512 [2022-11-20 20:15:12,097 INFO L226 Difference]: Without dead ends: 4512 [2022-11-20 20:15:12,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 20:15:12,105 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:12,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2022-11-20 20:15:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4512. [2022-11-20 20:15:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3943 states have (on average 3.2853157494293685) internal successors, (12954), 4511 states have internal predecessors, (12954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:12,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 12954 transitions. [2022-11-20 20:15:12,463 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 12954 transitions. Word has length 1 [2022-11-20 20:15:12,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:12,464 INFO L495 AbstractCegarLoop]: Abstraction has 4512 states and 12954 transitions. [2022-11-20 20:15:12,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:12,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 12954 transitions. [2022-11-20 20:15:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:15:12,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:12,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:15:12,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:15:12,470 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:12,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1591433, now seen corresponding path program 1 times [2022-11-20 20:15:12,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:12,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492826262] [2022-11-20 20:15:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:12,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:12,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:12,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492826262] [2022-11-20 20:15:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492826262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:12,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:12,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626140978] [2022-11-20 20:15:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:12,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:12,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:12,972 INFO L87 Difference]: Start difference. First operand 4512 states and 12954 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:13,188 INFO L93 Difference]: Finished difference Result 3956 states and 11392 transitions. [2022-11-20 20:15:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:15:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:13,219 INFO L225 Difference]: With dead ends: 3956 [2022-11-20 20:15:13,220 INFO L226 Difference]: Without dead ends: 3956 [2022-11-20 20:15:13,220 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 [2022-11-20 20:15:13,221 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:13,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 5 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2022-11-20 20:15:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3956. [2022-11-20 20:15:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3956 states, 3550 states have (on average 3.209014084507042) internal successors, (11392), 3955 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 11392 transitions. [2022-11-20 20:15:13,378 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 11392 transitions. Word has length 3 [2022-11-20 20:15:13,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:13,380 INFO L495 AbstractCegarLoop]: Abstraction has 3956 states and 11392 transitions. [2022-11-20 20:15:13,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 11392 transitions. [2022-11-20 20:15:13,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:15:13,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:13,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:15:13,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:15:13,381 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:13,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1591434, now seen corresponding path program 1 times [2022-11-20 20:15:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:13,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545941950] [2022-11-20 20:15:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:13,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:13,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545941950] [2022-11-20 20:15:13,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545941950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:13,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:13,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:13,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943445251] [2022-11-20 20:15:13,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:13,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:13,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:13,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:13,530 INFO L87 Difference]: Start difference. First operand 3956 states and 11392 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:13,806 INFO L93 Difference]: Finished difference Result 3520 states and 10165 transitions. [2022-11-20 20:15:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:15:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:13,832 INFO L225 Difference]: With dead ends: 3520 [2022-11-20 20:15:13,832 INFO L226 Difference]: Without dead ends: 3520 [2022-11-20 20:15:13,833 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 [2022-11-20 20:15:13,834 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:13,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 5 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:13,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3520 states. [2022-11-20 20:15:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3520 to 3520. [2022-11-20 20:15:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3520 states, 3230 states have (on average 3.1470588235294117) internal successors, (10165), 3519 states have internal predecessors, (10165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3520 states to 3520 states and 10165 transitions. [2022-11-20 20:15:13,968 INFO L78 Accepts]: Start accepts. Automaton has 3520 states and 10165 transitions. Word has length 3 [2022-11-20 20:15:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:13,968 INFO L495 AbstractCegarLoop]: Abstraction has 3520 states and 10165 transitions. [2022-11-20 20:15:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3520 states and 10165 transitions. [2022-11-20 20:15:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:15:13,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:13,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:15:13,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:15:13,970 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1591316, now seen corresponding path program 1 times [2022-11-20 20:15:13,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:13,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906305205] [2022-11-20 20:15:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:14,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:14,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906305205] [2022-11-20 20:15:14,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906305205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:14,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:14,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862715738] [2022-11-20 20:15:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:14,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:14,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:14,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:14,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:14,030 INFO L87 Difference]: Start difference. First operand 3520 states and 10165 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:14,191 INFO L93 Difference]: Finished difference Result 3460 states and 10039 transitions. [2022-11-20 20:15:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:14,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:15:14,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:14,220 INFO L225 Difference]: With dead ends: 3460 [2022-11-20 20:15:14,221 INFO L226 Difference]: Without dead ends: 3460 [2022-11-20 20:15:14,221 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 [2022-11-20 20:15:14,222 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:14,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 5 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-11-20 20:15:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3460. [2022-11-20 20:15:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 3189 states have (on average 3.148008780181875) internal successors, (10039), 3459 states have internal predecessors, (10039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 10039 transitions. [2022-11-20 20:15:14,353 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 10039 transitions. Word has length 3 [2022-11-20 20:15:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:14,354 INFO L495 AbstractCegarLoop]: Abstraction has 3460 states and 10039 transitions. [2022-11-20 20:15:14,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 10039 transitions. [2022-11-20 20:15:14,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 20:15:14,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:14,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 20:15:14,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:15:14,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1591317, now seen corresponding path program 1 times [2022-11-20 20:15:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212528731] [2022-11-20 20:15:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:14,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212528731] [2022-11-20 20:15:14,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212528731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:14,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:14,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040859818] [2022-11-20 20:15:14,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:14,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:14,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:14,475 INFO L87 Difference]: Start difference. First operand 3460 states and 10039 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:14,679 INFO L93 Difference]: Finished difference Result 3400 states and 9913 transitions. [2022-11-20 20:15:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 20:15:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:14,722 INFO L225 Difference]: With dead ends: 3400 [2022-11-20 20:15:14,723 INFO L226 Difference]: Without dead ends: 3400 [2022-11-20 20:15:14,723 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 [2022-11-20 20:15:14,724 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:14,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 5 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:14,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2022-11-20 20:15:14,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3400. [2022-11-20 20:15:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3400 states, 3148 states have (on average 3.1489834815756037) internal successors, (9913), 3399 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 9913 transitions. [2022-11-20 20:15:14,886 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 9913 transitions. Word has length 3 [2022-11-20 20:15:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:14,887 INFO L495 AbstractCegarLoop]: Abstraction has 3400 states and 9913 transitions. [2022-11-20 20:15:14,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 9913 transitions. [2022-11-20 20:15:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 20:15:14,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:14,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 20:15:14,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:15:14,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 49331539, now seen corresponding path program 1 times [2022-11-20 20:15:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:14,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952505576] [2022-11-20 20:15:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:14,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:16,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:16,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952505576] [2022-11-20 20:15:16,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952505576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:16,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:16,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:16,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475971497] [2022-11-20 20:15:16,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:16,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:16,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:16,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:16,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:16,798 INFO L87 Difference]: Start difference. First operand 3400 states and 9913 transitions. Second operand has 3 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) [2022-11-20 20:15:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:17,401 INFO L93 Difference]: Finished difference Result 3399 states and 9911 transitions. [2022-11-20 20:15:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:17,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 [2022-11-20 20:15:17,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:17,421 INFO L225 Difference]: With dead ends: 3399 [2022-11-20 20:15:17,422 INFO L226 Difference]: Without dead ends: 3399 [2022-11-20 20:15:17,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:17,424 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:17,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:15:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2022-11-20 20:15:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3399. [2022-11-20 20:15:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 3147 states have (on average 3.1493485859548778) internal successors, (9911), 3398 states have internal predecessors, (9911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 9911 transitions. [2022-11-20 20:15:17,539 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 9911 transitions. Word has length 4 [2022-11-20 20:15:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:17,540 INFO L495 AbstractCegarLoop]: Abstraction has 3399 states and 9911 transitions. [2022-11-20 20:15:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-11-20 20:15:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 9911 transitions. [2022-11-20 20:15:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:15:17,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:17,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:15:17,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 20:15:17,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:17,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1529276634, now seen corresponding path program 1 times [2022-11-20 20:15:17,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:17,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762408315] [2022-11-20 20:15:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:17,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:17,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762408315] [2022-11-20 20:15:17,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762408315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:17,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:17,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:17,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950071835] [2022-11-20 20:15:17,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:17,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:17,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:17,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:17,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:17,748 INFO L87 Difference]: Start difference. First operand 3399 states and 9911 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) [2022-11-20 20:15:17,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:17,994 INFO L93 Difference]: Finished difference Result 3055 states and 8939 transitions. [2022-11-20 20:15:17,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:15:17,995 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 [2022-11-20 20:15:17,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:18,011 INFO L225 Difference]: With dead ends: 3055 [2022-11-20 20:15:18,011 INFO L226 Difference]: Without dead ends: 3055 [2022-11-20 20:15:18,011 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 [2022-11-20 20:15:18,012 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 136 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:18,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 7 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2022-11-20 20:15:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 3055. [2022-11-20 20:15:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 2887 states have (on average 3.096293730516107) internal successors, (8939), 3054 states have internal predecessors, (8939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 8939 transitions. [2022-11-20 20:15:18,185 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 8939 transitions. Word has length 5 [2022-11-20 20:15:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:18,186 INFO L495 AbstractCegarLoop]: Abstraction has 3055 states and 8939 transitions. [2022-11-20 20:15:18,186 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) [2022-11-20 20:15:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 8939 transitions. [2022-11-20 20:15:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:15:18,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:18,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:15:18,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 20:15:18,189 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:18,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:18,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1529275228, now seen corresponding path program 1 times [2022-11-20 20:15:18,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:18,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231837743] [2022-11-20 20:15:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:18,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:19,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:19,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231837743] [2022-11-20 20:15:19,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231837743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:19,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:19,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:19,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96490821] [2022-11-20 20:15:19,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:19,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:19,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:19,100 INFO L87 Difference]: Start difference. First operand 3055 states and 8939 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) [2022-11-20 20:15:19,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:19,564 INFO L93 Difference]: Finished difference Result 3158 states and 9247 transitions. [2022-11-20 20:15:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:19,565 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 [2022-11-20 20:15:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:19,582 INFO L225 Difference]: With dead ends: 3158 [2022-11-20 20:15:19,583 INFO L226 Difference]: Without dead ends: 3158 [2022-11-20 20:15:19,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:19,584 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:19,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 11 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:15:19,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2022-11-20 20:15:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 3122. [2022-11-20 20:15:19,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 2954 states have (on average 3.094109681787407) internal successors, (9140), 3121 states have internal predecessors, (9140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 9140 transitions. [2022-11-20 20:15:19,725 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 9140 transitions. Word has length 5 [2022-11-20 20:15:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:19,726 INFO L495 AbstractCegarLoop]: Abstraction has 3122 states and 9140 transitions. [2022-11-20 20:15:19,726 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) [2022-11-20 20:15:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 9140 transitions. [2022-11-20 20:15:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:15:19,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:19,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:15:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:15:19,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:19,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1529288941, now seen corresponding path program 1 times [2022-11-20 20:15:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:19,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319484720] [2022-11-20 20:15:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:19,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:19,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319484720] [2022-11-20 20:15:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319484720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:19,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:19,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453131366] [2022-11-20 20:15:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:19,870 INFO L87 Difference]: Start difference. First operand 3122 states and 9140 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) [2022-11-20 20:15:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:20,016 INFO L93 Difference]: Finished difference Result 2370 states and 6726 transitions. [2022-11-20 20:15:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:20,017 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 [2022-11-20 20:15:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:20,028 INFO L225 Difference]: With dead ends: 2370 [2022-11-20 20:15:20,029 INFO L226 Difference]: Without dead ends: 2370 [2022-11-20 20:15:20,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:20,030 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 137 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:20,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 5 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-11-20 20:15:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2370. [2022-11-20 20:15:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2370 states, 2258 states have (on average 2.978742249778565) internal successors, (6726), 2369 states have internal predecessors, (6726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2370 states to 2370 states and 6726 transitions. [2022-11-20 20:15:20,108 INFO L78 Accepts]: Start accepts. Automaton has 2370 states and 6726 transitions. Word has length 5 [2022-11-20 20:15:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:20,109 INFO L495 AbstractCegarLoop]: Abstraction has 2370 states and 6726 transitions. [2022-11-20 20:15:20,109 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) [2022-11-20 20:15:20,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2370 states and 6726 transitions. [2022-11-20 20:15:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:15:20,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:20,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:15:20,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:15:20,110 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1529288943, now seen corresponding path program 1 times [2022-11-20 20:15:20,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:20,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38053445] [2022-11-20 20:15:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:20,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:20,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38053445] [2022-11-20 20:15:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38053445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:20,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:20,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:20,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885678937] [2022-11-20 20:15:20,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:20,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:20,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:20,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:20,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:20,187 INFO L87 Difference]: Start difference. First operand 2370 states and 6726 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) [2022-11-20 20:15:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:20,307 INFO L93 Difference]: Finished difference Result 1618 states and 4312 transitions. [2022-11-20 20:15:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:20,308 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 [2022-11-20 20:15:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:20,315 INFO L225 Difference]: With dead ends: 1618 [2022-11-20 20:15:20,315 INFO L226 Difference]: Without dead ends: 1618 [2022-11-20 20:15:20,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:20,316 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:20,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 5 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:20,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-20 20:15:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1618. [2022-11-20 20:15:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1562 states have (on average 2.76056338028169) internal successors, (4312), 1617 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 4312 transitions. [2022-11-20 20:15:20,366 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 4312 transitions. Word has length 5 [2022-11-20 20:15:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:20,367 INFO L495 AbstractCegarLoop]: Abstraction has 1618 states and 4312 transitions. [2022-11-20 20:15:20,367 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) [2022-11-20 20:15:20,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 4312 transitions. [2022-11-20 20:15:20,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:15:20,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:20,368 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:20,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:15:20,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:20,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash 767946519, now seen corresponding path program 1 times [2022-11-20 20:15:20,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:20,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242438470] [2022-11-20 20:15:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:20,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:20,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242438470] [2022-11-20 20:15:20,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242438470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:20,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:20,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:20,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383773546] [2022-11-20 20:15:20,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:20,443 INFO L87 Difference]: Start difference. First operand 1618 states and 4312 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) [2022-11-20 20:15:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:20,604 INFO L93 Difference]: Finished difference Result 1250 states and 3250 transitions. [2022-11-20 20:15:20,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:20,604 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 [2022-11-20 20:15:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:20,609 INFO L225 Difference]: With dead ends: 1250 [2022-11-20 20:15:20,609 INFO L226 Difference]: Without dead ends: 1246 [2022-11-20 20:15:20,609 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 [2022-11-20 20:15:20,610 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:20,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 13 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-11-20 20:15:20,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1208. [2022-11-20 20:15:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1171 states have (on average 2.71733561058924) internal successors, (3182), 1207 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 3182 transitions. [2022-11-20 20:15:20,644 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 3182 transitions. Word has length 7 [2022-11-20 20:15:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:20,644 INFO L495 AbstractCegarLoop]: Abstraction has 1208 states and 3182 transitions. [2022-11-20 20:15:20,645 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) [2022-11-20 20:15:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 3182 transitions. [2022-11-20 20:15:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:15:20,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:20,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:20,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:15:20,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1702402820, now seen corresponding path program 1 times [2022-11-20 20:15:20,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:20,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042660786] [2022-11-20 20:15:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:20,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:20,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:20,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042660786] [2022-11-20 20:15:20,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042660786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:20,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:20,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 20:15:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193152032] [2022-11-20 20:15:20,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:20,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:20,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:20,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:20,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:20,759 INFO L87 Difference]: Start difference. First operand 1208 states and 3182 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:20,866 INFO L93 Difference]: Finished difference Result 1106 states and 2921 transitions. [2022-11-20 20:15:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:20,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:15:20,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:20,870 INFO L225 Difference]: With dead ends: 1106 [2022-11-20 20:15:20,871 INFO L226 Difference]: Without dead ends: 1106 [2022-11-20 20:15:20,871 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 [2022-11-20 20:15:20,872 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:20,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 5 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2022-11-20 20:15:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1106. [2022-11-20 20:15:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1082 states have (on average 2.699630314232902) internal successors, (2921), 1105 states have internal predecessors, (2921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 2921 transitions. [2022-11-20 20:15:20,921 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 2921 transitions. Word has length 10 [2022-11-20 20:15:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:20,921 INFO L495 AbstractCegarLoop]: Abstraction has 1106 states and 2921 transitions. [2022-11-20 20:15:20,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 2921 transitions. [2022-11-20 20:15:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:15:20,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:20,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:20,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 20:15:20,925 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:20,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1702402821, now seen corresponding path program 1 times [2022-11-20 20:15:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:20,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891802576] [2022-11-20 20:15:20,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:20,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:22,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:22,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891802576] [2022-11-20 20:15:22,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891802576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:22,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:15:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778811454] [2022-11-20 20:15:22,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:22,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:22,735 INFO L87 Difference]: Start difference. First operand 1106 states and 2921 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:23,589 INFO L93 Difference]: Finished difference Result 1105 states and 2918 transitions. [2022-11-20 20:15:23,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:23,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:15:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:23,597 INFO L225 Difference]: With dead ends: 1105 [2022-11-20 20:15:23,597 INFO L226 Difference]: Without dead ends: 1105 [2022-11-20 20:15:23,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:23,598 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:23,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:15:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2022-11-20 20:15:23,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 1105. [2022-11-20 20:15:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1081 states have (on average 2.6993524514338576) internal successors, (2918), 1104 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 2918 transitions. [2022-11-20 20:15:23,629 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 2918 transitions. Word has length 10 [2022-11-20 20:15:23,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:23,629 INFO L495 AbstractCegarLoop]: Abstraction has 1105 states and 2918 transitions. [2022-11-20 20:15:23,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 2918 transitions. [2022-11-20 20:15:23,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:15:23,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:23,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:15:23,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:23,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1044784742, now seen corresponding path program 1 times [2022-11-20 20:15:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:23,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32440927] [2022-11-20 20:15:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:23,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:23,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32440927] [2022-11-20 20:15:23,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32440927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:23,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:23,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:23,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534534967] [2022-11-20 20:15:23,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:23,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:23,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:23,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:23,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:23,815 INFO L87 Difference]: Start difference. First operand 1105 states and 2918 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:23,926 INFO L93 Difference]: Finished difference Result 1093 states and 2889 transitions. [2022-11-20 20:15:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:15:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 20:15:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:23,932 INFO L225 Difference]: With dead ends: 1093 [2022-11-20 20:15:23,933 INFO L226 Difference]: Without dead ends: 1093 [2022-11-20 20:15:23,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:23,934 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:23,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 5 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-20 20:15:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2022-11-20 20:15:23,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1071 states have (on average 2.697478991596639) internal successors, (2889), 1092 states have internal predecessors, (2889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2889 transitions. [2022-11-20 20:15:23,963 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2889 transitions. Word has length 11 [2022-11-20 20:15:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:23,964 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 2889 transitions. [2022-11-20 20:15:23,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2889 transitions. [2022-11-20 20:15:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:15:23,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:23,965 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:15:23,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1971409983, now seen corresponding path program 1 times [2022-11-20 20:15:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:23,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099701451] [2022-11-20 20:15:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:24,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:24,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099701451] [2022-11-20 20:15:24,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099701451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:24,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:24,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843376657] [2022-11-20 20:15:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:24,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:24,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:24,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:24,021 INFO L87 Difference]: Start difference. First operand 1093 states and 2889 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:24,165 INFO L93 Difference]: Finished difference Result 1093 states and 2877 transitions. [2022-11-20 20:15:24,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:24,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:15:24,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:24,170 INFO L225 Difference]: With dead ends: 1093 [2022-11-20 20:15:24,170 INFO L226 Difference]: Without dead ends: 1093 [2022-11-20 20:15:24,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:24,171 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:24,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 16 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:24,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-11-20 20:15:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2022-11-20 20:15:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1071 states have (on average 2.6862745098039214) internal successors, (2877), 1092 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 2877 transitions. [2022-11-20 20:15:24,203 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 2877 transitions. Word has length 12 [2022-11-20 20:15:24,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:24,204 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 2877 transitions. [2022-11-20 20:15:24,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 2877 transitions. [2022-11-20 20:15:24,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:15:24,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:24,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:24,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 20:15:24,206 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:24,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:24,207 INFO L85 PathProgramCache]: Analyzing trace with hash -442493023, now seen corresponding path program 1 times [2022-11-20 20:15:24,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:24,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652442993] [2022-11-20 20:15:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:25,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:25,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652442993] [2022-11-20 20:15:25,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652442993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:25,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:25,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:15:25,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744250982] [2022-11-20 20:15:25,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:25,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:15:25,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:25,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:15:25,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:25,341 INFO L87 Difference]: Start difference. First operand 1093 states and 2877 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:25,986 INFO L93 Difference]: Finished difference Result 1190 states and 3117 transitions. [2022-11-20 20:15:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:15:25,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:15:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:25,992 INFO L225 Difference]: With dead ends: 1190 [2022-11-20 20:15:25,992 INFO L226 Difference]: Without dead ends: 1190 [2022-11-20 20:15:25,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:15:25,994 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 62 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:25,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 26 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:15:25,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-20 20:15:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1082. [2022-11-20 20:15:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1060 states have (on average 2.6783018867924526) internal successors, (2839), 1081 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 2839 transitions. [2022-11-20 20:15:26,024 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 2839 transitions. Word has length 14 [2022-11-20 20:15:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:26,025 INFO L495 AbstractCegarLoop]: Abstraction has 1082 states and 2839 transitions. [2022-11-20 20:15:26,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 2839 transitions. [2022-11-20 20:15:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:15:26,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:26,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:26,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 20:15:26,027 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1733186227, now seen corresponding path program 1 times [2022-11-20 20:15:26,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:26,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668718247] [2022-11-20 20:15:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:26,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:27,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:27,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668718247] [2022-11-20 20:15:27,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668718247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:27,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:27,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:15:27,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443858770] [2022-11-20 20:15:27,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:27,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:15:27,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:15:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:15:27,213 INFO L87 Difference]: Start difference. First operand 1082 states and 2839 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:27,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:27,694 INFO L93 Difference]: Finished difference Result 1080 states and 2835 transitions. [2022-11-20 20:15:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:15:27,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 20:15:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:27,699 INFO L225 Difference]: With dead ends: 1080 [2022-11-20 20:15:27,699 INFO L226 Difference]: Without dead ends: 1080 [2022-11-20 20:15:27,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:15:27,700 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:27,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 41 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:15:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-20 20:15:27,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-11-20 20:15:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1058 states have (on average 2.679584120982987) internal successors, (2835), 1079 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:27,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 2835 transitions. [2022-11-20 20:15:27,729 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 2835 transitions. Word has length 14 [2022-11-20 20:15:27,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:27,729 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 2835 transitions. [2022-11-20 20:15:27,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:27,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 2835 transitions. [2022-11-20 20:15:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:15:27,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:27,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:27,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 20:15:27,731 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1112193644, now seen corresponding path program 1 times [2022-11-20 20:15:27,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:27,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888213089] [2022-11-20 20:15:27,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:27,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:28,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:28,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888213089] [2022-11-20 20:15:28,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888213089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:28,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:28,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:15:28,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18369453] [2022-11-20 20:15:28,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:28,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:15:28,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:28,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:15:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:15:28,986 INFO L87 Difference]: Start difference. First operand 1080 states and 2835 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:29,871 INFO L93 Difference]: Finished difference Result 1209 states and 3156 transitions. [2022-11-20 20:15:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:15:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:15:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:29,877 INFO L225 Difference]: With dead ends: 1209 [2022-11-20 20:15:29,878 INFO L226 Difference]: Without dead ends: 1209 [2022-11-20 20:15:29,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:15:29,879 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:29,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:15:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-11-20 20:15:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1113. [2022-11-20 20:15:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1091 states have (on average 2.6727772685609534) internal successors, (2916), 1112 states have internal predecessors, (2916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 2916 transitions. [2022-11-20 20:15:29,908 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 2916 transitions. Word has length 15 [2022-11-20 20:15:29,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:29,908 INFO L495 AbstractCegarLoop]: Abstraction has 1113 states and 2916 transitions. [2022-11-20 20:15:29,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 2916 transitions. [2022-11-20 20:15:29,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:15:29,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:29,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:29,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 20:15:29,910 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:29,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:29,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2105912772, now seen corresponding path program 2 times [2022-11-20 20:15:29,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:29,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638075894] [2022-11-20 20:15:29,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:29,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:31,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:31,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638075894] [2022-11-20 20:15:31,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638075894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:31,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:15:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210731996] [2022-11-20 20:15:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:15:31,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:15:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:15:31,095 INFO L87 Difference]: Start difference. First operand 1113 states and 2916 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:31,913 INFO L93 Difference]: Finished difference Result 1152 states and 3019 transitions. [2022-11-20 20:15:31,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:15:31,913 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:15:31,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:31,918 INFO L225 Difference]: With dead ends: 1152 [2022-11-20 20:15:31,918 INFO L226 Difference]: Without dead ends: 1152 [2022-11-20 20:15:31,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:15:31,919 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:31,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 33 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:15:31,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-20 20:15:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1058. [2022-11-20 20:15:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1038 states have (on average 2.679190751445087) internal successors, (2781), 1057 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:31,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2781 transitions. [2022-11-20 20:15:31,946 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2781 transitions. Word has length 15 [2022-11-20 20:15:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:31,947 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 2781 transitions. [2022-11-20 20:15:31,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2781 transitions. [2022-11-20 20:15:31,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:15:31,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:31,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:31,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-20 20:15:31,949 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash -856382825, now seen corresponding path program 1 times [2022-11-20 20:15:31,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009393064] [2022-11-20 20:15:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:31,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:33,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:33,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009393064] [2022-11-20 20:15:33,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009393064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:33,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:33,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 20:15:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254012013] [2022-11-20 20:15:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:15:33,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:15:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:15:33,610 INFO L87 Difference]: Start difference. First operand 1058 states and 2781 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:34,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:34,211 INFO L93 Difference]: Finished difference Result 1186 states and 3100 transitions. [2022-11-20 20:15:34,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:15:34,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-11-20 20:15:34,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:34,216 INFO L225 Difference]: With dead ends: 1186 [2022-11-20 20:15:34,216 INFO L226 Difference]: Without dead ends: 1186 [2022-11-20 20:15:34,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:15:34,217 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:34,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 25 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:15:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-11-20 20:15:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1156. [2022-11-20 20:15:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1136 states have (on average 2.6778169014084505) internal successors, (3042), 1155 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 3042 transitions. [2022-11-20 20:15:34,247 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 3042 transitions. Word has length 16 [2022-11-20 20:15:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:34,248 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 3042 transitions. [2022-11-20 20:15:34,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 3042 transitions. [2022-11-20 20:15:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:15:34,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:34,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:34,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 20:15:34,250 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 627728696, now seen corresponding path program 1 times [2022-11-20 20:15:34,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:34,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274528321] [2022-11-20 20:15:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:34,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:35,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274528321] [2022-11-20 20:15:35,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274528321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:35,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:35,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:15:35,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790182903] [2022-11-20 20:15:35,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:35,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:15:35,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:35,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:15:35,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:15:35,672 INFO L87 Difference]: Start difference. First operand 1156 states and 3042 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:36,568 INFO L93 Difference]: Finished difference Result 1274 states and 3336 transitions. [2022-11-20 20:15:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:15:36,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 20:15:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:36,575 INFO L225 Difference]: With dead ends: 1274 [2022-11-20 20:15:36,575 INFO L226 Difference]: Without dead ends: 1274 [2022-11-20 20:15:36,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:15:36,576 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 75 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:36,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 33 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:15:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-11-20 20:15:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1145. [2022-11-20 20:15:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1125 states have (on average 2.68) internal successors, (3015), 1144 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 3015 transitions. [2022-11-20 20:15:36,620 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 3015 transitions. Word has length 17 [2022-11-20 20:15:36,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:36,622 INFO L495 AbstractCegarLoop]: Abstraction has 1145 states and 3015 transitions. [2022-11-20 20:15:36,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:36,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 3015 transitions. [2022-11-20 20:15:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:15:36,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:36,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:36,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 20:15:36,624 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash -778065980, now seen corresponding path program 2 times [2022-11-20 20:15:36,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:36,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204034467] [2022-11-20 20:15:36,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:36,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:38,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:38,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204034467] [2022-11-20 20:15:38,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204034467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:38,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:38,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:15:38,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990568906] [2022-11-20 20:15:38,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:38,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 20:15:38,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:38,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 20:15:38,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:15:38,010 INFO L87 Difference]: Start difference. First operand 1145 states and 3015 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:38,769 INFO L93 Difference]: Finished difference Result 1196 states and 3145 transitions. [2022-11-20 20:15:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:15:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 20:15:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:38,774 INFO L225 Difference]: With dead ends: 1196 [2022-11-20 20:15:38,775 INFO L226 Difference]: Without dead ends: 1196 [2022-11-20 20:15:38,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:15:38,778 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:38,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 29 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:15:38,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-20 20:15:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1086. [2022-11-20 20:15:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1066 states have (on average 2.6885553470919326) internal successors, (2866), 1085 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2866 transitions. [2022-11-20 20:15:38,806 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2866 transitions. Word has length 17 [2022-11-20 20:15:38,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:38,807 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 2866 transitions. [2022-11-20 20:15:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:38,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2866 transitions. [2022-11-20 20:15:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:15:38,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:38,809 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] [2022-11-20 20:15:38,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 20:15:38,809 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:38,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2044675396, now seen corresponding path program 1 times [2022-11-20 20:15:38,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337170745] [2022-11-20 20:15:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:38,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:39,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337170745] [2022-11-20 20:15:39,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337170745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:39,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:39,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 20:15:39,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245550761] [2022-11-20 20:15:39,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:39,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:15:39,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:15:39,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:39,053 INFO L87 Difference]: Start difference. First operand 1086 states and 2866 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:39,251 INFO L93 Difference]: Finished difference Result 1338 states and 3517 transitions. [2022-11-20 20:15:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:15:39,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 20:15:39,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:39,259 INFO L225 Difference]: With dead ends: 1338 [2022-11-20 20:15:39,259 INFO L226 Difference]: Without dead ends: 1338 [2022-11-20 20:15:39,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:15:39,260 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 112 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:39,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 8 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-11-20 20:15:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 1194. [2022-11-20 20:15:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1174 states have (on average 2.683986371379898) internal successors, (3151), 1193 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3151 transitions. [2022-11-20 20:15:39,295 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3151 transitions. Word has length 22 [2022-11-20 20:15:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:39,295 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 3151 transitions. [2022-11-20 20:15:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3151 transitions. [2022-11-20 20:15:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 20:15:39,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:39,298 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] [2022-11-20 20:15:39,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 20:15:39,298 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:39,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash 240087466, now seen corresponding path program 1 times [2022-11-20 20:15:39,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:39,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420807493] [2022-11-20 20:15:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:39,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:39,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420807493] [2022-11-20 20:15:39,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420807493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:39,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:39,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195144927] [2022-11-20 20:15:39,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:39,368 INFO L87 Difference]: Start difference. First operand 1194 states and 3151 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:39,514 INFO L93 Difference]: Finished difference Result 734 states and 1849 transitions. [2022-11-20 20:15:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 20:15:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:39,518 INFO L225 Difference]: With dead ends: 734 [2022-11-20 20:15:39,518 INFO L226 Difference]: Without dead ends: 702 [2022-11-20 20:15:39,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:39,520 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:39,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 10 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:15:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-20 20:15:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 670. [2022-11-20 20:15:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 655 states have (on average 2.5801526717557253) internal successors, (1690), 669 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1690 transitions. [2022-11-20 20:15:39,540 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1690 transitions. Word has length 25 [2022-11-20 20:15:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:39,540 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 1690 transitions. [2022-11-20 20:15:39,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1690 transitions. [2022-11-20 20:15:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:15:39,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:39,545 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, 1, 1] [2022-11-20 20:15:39,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 20:15:39,546 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:39,546 INFO L85 PathProgramCache]: Analyzing trace with hash 115459999, now seen corresponding path program 1 times [2022-11-20 20:15:39,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:39,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052312309] [2022-11-20 20:15:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:39,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:39,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052312309] [2022-11-20 20:15:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052312309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:39,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:39,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:39,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910007584] [2022-11-20 20:15:39,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:39,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:39,660 INFO L87 Difference]: Start difference. First operand 670 states and 1690 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:39,854 INFO L93 Difference]: Finished difference Result 1070 states and 2710 transitions. [2022-11-20 20:15:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-20 20:15:39,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:39,858 INFO L225 Difference]: With dead ends: 1070 [2022-11-20 20:15:39,858 INFO L226 Difference]: Without dead ends: 1070 [2022-11-20 20:15:39,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:39,859 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:39,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 19 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:39,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-11-20 20:15:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 736. [2022-11-20 20:15:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 721 states have (on average 2.6560332871012484) internal successors, (1915), 735 states have internal predecessors, (1915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1915 transitions. [2022-11-20 20:15:39,882 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1915 transitions. Word has length 27 [2022-11-20 20:15:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:39,882 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1915 transitions. [2022-11-20 20:15:39,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1915 transitions. [2022-11-20 20:15:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:15:39,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:39,885 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, 1, 1, 1, 1] [2022-11-20 20:15:39,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 20:15:39,885 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:39,886 INFO L85 PathProgramCache]: Analyzing trace with hash 587049989, now seen corresponding path program 1 times [2022-11-20 20:15:39,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:39,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111887386] [2022-11-20 20:15:39,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:39,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:39,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:39,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111887386] [2022-11-20 20:15:39,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111887386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:15:39,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081194520] [2022-11-20 20:15:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:39,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:39,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:39,991 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:40,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:15:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:40,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:15:40,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:40,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:40,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:15:40,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:15:40,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081194520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:15:40,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1535240510] [2022-11-20 20:15:40,358 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 20:15:40,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:15:40,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 20:15:40,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530584965] [2022-11-20 20:15:40,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:15:40,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:15:40,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:40,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:15:40,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:15:40,374 INFO L87 Difference]: Start difference. First operand 736 states and 1915 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:40,802 INFO L93 Difference]: Finished difference Result 2068 states and 5353 transitions. [2022-11-20 20:15:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:15:40,802 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 20:15:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:40,810 INFO L225 Difference]: With dead ends: 2068 [2022-11-20 20:15:40,810 INFO L226 Difference]: Without dead ends: 2068 [2022-11-20 20:15:40,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:15:40,817 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 414 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:40,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 38 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:15:40,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2022-11-20 20:15:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1876. [2022-11-20 20:15:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1861 states have (on average 2.7329392799570122) internal successors, (5086), 1875 states have internal predecessors, (5086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5086 transitions. [2022-11-20 20:15:40,875 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5086 transitions. Word has length 29 [2022-11-20 20:15:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:40,876 INFO L495 AbstractCegarLoop]: Abstraction has 1876 states and 5086 transitions. [2022-11-20 20:15:40,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:40,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5086 transitions. [2022-11-20 20:15:40,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:15:40,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:40,881 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, 1, 1, 1, 1] [2022-11-20 20:15:40,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 20:15:41,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 20:15:41,089 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:41,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1632009879, now seen corresponding path program 1 times [2022-11-20 20:15:41,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:41,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573090480] [2022-11-20 20:15:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:41,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:41,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:41,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573090480] [2022-11-20 20:15:41,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573090480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:41,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:41,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364978964] [2022-11-20 20:15:41,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:41,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:41,231 INFO L87 Difference]: Start difference. First operand 1876 states and 5086 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:41,398 INFO L93 Difference]: Finished difference Result 1166 states and 2611 transitions. [2022-11-20 20:15:41,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:41,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-20 20:15:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:41,402 INFO L225 Difference]: With dead ends: 1166 [2022-11-20 20:15:41,402 INFO L226 Difference]: Without dead ends: 1126 [2022-11-20 20:15:41,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:15:41,403 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:41,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:41,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-11-20 20:15:41,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1118. [2022-11-20 20:15:41,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1108 states have (on average 2.2815884476534296) internal successors, (2528), 1117 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2528 transitions. [2022-11-20 20:15:41,431 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2528 transitions. Word has length 29 [2022-11-20 20:15:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:41,431 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 2528 transitions. [2022-11-20 20:15:41,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2528 transitions. [2022-11-20 20:15:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:15:41,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:41,434 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, 1, 1, 1, 1, 1] [2022-11-20 20:15:41,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 20:15:41,434 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:41,435 INFO L85 PathProgramCache]: Analyzing trace with hash -25150421, now seen corresponding path program 1 times [2022-11-20 20:15:41,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:41,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285924118] [2022-11-20 20:15:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:41,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:43,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:43,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285924118] [2022-11-20 20:15:43,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285924118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:43,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:43,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 20:15:43,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733546158] [2022-11-20 20:15:43,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:43,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:15:43,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:43,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:15:43,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:15:43,400 INFO L87 Difference]: Start difference. First operand 1118 states and 2528 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:44,595 INFO L93 Difference]: Finished difference Result 1379 states and 3066 transitions. [2022-11-20 20:15:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:15:44,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-11-20 20:15:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:44,601 INFO L225 Difference]: With dead ends: 1379 [2022-11-20 20:15:44,601 INFO L226 Difference]: Without dead ends: 1379 [2022-11-20 20:15:44,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:15:44,602 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:44,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 40 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:15:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-11-20 20:15:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1251. [2022-11-20 20:15:44,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1241 states have (on average 2.250604351329573) internal successors, (2793), 1250 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 2793 transitions. [2022-11-20 20:15:44,635 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 2793 transitions. Word has length 30 [2022-11-20 20:15:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:44,636 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 2793 transitions. [2022-11-20 20:15:44,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 2793 transitions. [2022-11-20 20:15:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 20:15:44,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:44,640 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, 1, 1, 1, 1, 1] [2022-11-20 20:15:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 20:15:44,640 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 560580401, now seen corresponding path program 2 times [2022-11-20 20:15:44,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:44,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608678460] [2022-11-20 20:15:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:46,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:46,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608678460] [2022-11-20 20:15:46,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608678460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:46,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:46,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-20 20:15:46,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270482387] [2022-11-20 20:15:46,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:15:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:15:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:15:46,547 INFO L87 Difference]: Start difference. First operand 1251 states and 2793 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:47,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:47,622 INFO L93 Difference]: Finished difference Result 1330 states and 2950 transitions. [2022-11-20 20:15:47,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 20:15:47,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2022-11-20 20:15:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:47,626 INFO L225 Difference]: With dead ends: 1330 [2022-11-20 20:15:47,626 INFO L226 Difference]: Without dead ends: 1330 [2022-11-20 20:15:47,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2022-11-20 20:15:47,629 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:47,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 34 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:15:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-11-20 20:15:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1118. [2022-11-20 20:15:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1108 states have (on average 2.267148014440433) internal successors, (2512), 1117 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:47,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 2512 transitions. [2022-11-20 20:15:47,653 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 2512 transitions. Word has length 30 [2022-11-20 20:15:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:47,654 INFO L495 AbstractCegarLoop]: Abstraction has 1118 states and 2512 transitions. [2022-11-20 20:15:47,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 2512 transitions. [2022-11-20 20:15:47,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 20:15:47,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:47,656 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, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:47,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 20:15:47,658 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:47,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:47,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1195206002, now seen corresponding path program 1 times [2022-11-20 20:15:47,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:47,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918096697] [2022-11-20 20:15:47,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:47,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:50,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:50,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918096697] [2022-11-20 20:15:50,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918096697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:50,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:50,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 20:15:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954360991] [2022-11-20 20:15:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:15:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:15:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:15:50,919 INFO L87 Difference]: Start difference. First operand 1118 states and 2512 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:52,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:52,125 INFO L93 Difference]: Finished difference Result 1671 states and 3752 transitions. [2022-11-20 20:15:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 20:15:52,126 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 20:15:52,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:52,131 INFO L225 Difference]: With dead ends: 1671 [2022-11-20 20:15:52,131 INFO L226 Difference]: Without dead ends: 1671 [2022-11-20 20:15:52,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:15:52,132 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 190 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:52,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 25 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:15:52,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-11-20 20:15:52,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1417. [2022-11-20 20:15:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1407 states have (on average 2.259417199715707) internal successors, (3179), 1416 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 3179 transitions. [2022-11-20 20:15:52,168 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 3179 transitions. Word has length 31 [2022-11-20 20:15:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:52,168 INFO L495 AbstractCegarLoop]: Abstraction has 1417 states and 3179 transitions. [2022-11-20 20:15:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 3179 transitions. [2022-11-20 20:15:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 20:15:52,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:52,171 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, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 20:15:52,171 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1759988124, now seen corresponding path program 2 times [2022-11-20 20:15:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012302227] [2022-11-20 20:15:52,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:52,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:55,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:55,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012302227] [2022-11-20 20:15:55,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012302227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:55,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:55,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 20:15:55,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674057707] [2022-11-20 20:15:55,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:55,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 20:15:55,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 20:15:55,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:15:55,078 INFO L87 Difference]: Start difference. First operand 1417 states and 3179 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:56,359 INFO L93 Difference]: Finished difference Result 1704 states and 3844 transitions. [2022-11-20 20:15:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:15:56,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-20 20:15:56,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:56,363 INFO L225 Difference]: With dead ends: 1704 [2022-11-20 20:15:56,363 INFO L226 Difference]: Without dead ends: 1704 [2022-11-20 20:15:56,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:15:56,364 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 208 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:56,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 28 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:15:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2022-11-20 20:15:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1222. [2022-11-20 20:15:56,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1212 states have (on average 2.2805280528052805) internal successors, (2764), 1221 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2764 transitions. [2022-11-20 20:15:56,399 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2764 transitions. Word has length 31 [2022-11-20 20:15:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:56,399 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 2764 transitions. [2022-11-20 20:15:56,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2764 transitions. [2022-11-20 20:15:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 20:15:56,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:56,402 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:56,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 20:15:56,403 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:56,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1603317021, now seen corresponding path program 1 times [2022-11-20 20:15:56,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:56,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727475443] [2022-11-20 20:15:56,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:56,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:15:56,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:56,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727475443] [2022-11-20 20:15:56,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727475443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:56,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:15:56,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:15:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579958870] [2022-11-20 20:15:56,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:56,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:15:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:15:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:56,708 INFO L87 Difference]: Start difference. First operand 1222 states and 2764 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:56,919 INFO L93 Difference]: Finished difference Result 1290 states and 2860 transitions. [2022-11-20 20:15:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:15:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-20 20:15:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:56,924 INFO L225 Difference]: With dead ends: 1290 [2022-11-20 20:15:56,924 INFO L226 Difference]: Without dead ends: 1290 [2022-11-20 20:15:56,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:15:56,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 123 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:56,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 10 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:15:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-20 20:15:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1206. [2022-11-20 20:15:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1198 states have (on average 2.2387312186978297) internal successors, (2682), 1205 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2682 transitions. [2022-11-20 20:15:56,953 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2682 transitions. Word has length 32 [2022-11-20 20:15:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:56,954 INFO L495 AbstractCegarLoop]: Abstraction has 1206 states and 2682 transitions. [2022-11-20 20:15:56,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2682 transitions. [2022-11-20 20:15:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:15:56,956 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:56,956 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-20 20:15:56,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 20:15:56,957 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1872412663, now seen corresponding path program 2 times [2022-11-20 20:15:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:56,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346376644] [2022-11-20 20:15:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:56,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:15:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:15:57,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:15:57,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346376644] [2022-11-20 20:15:57,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346376644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:15:57,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042844660] [2022-11-20 20:15:57,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:15:57,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:15:57,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:15:57,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:15:57,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:15:57,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 20:15:57,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:15:57,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:15:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:15:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 20:15:57,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:15:57,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042844660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:15:57,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:15:57,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-20 20:15:57,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902595257] [2022-11-20 20:15:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:15:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:15:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:15:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:15:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:57,685 INFO L87 Difference]: Start difference. First operand 1206 states and 2682 transitions. Second operand has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:15:57,741 INFO L93 Difference]: Finished difference Result 1285 states and 2853 transitions. [2022-11-20 20:15:57,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:15:57,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-20 20:15:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:15:57,746 INFO L225 Difference]: With dead ends: 1285 [2022-11-20 20:15:57,746 INFO L226 Difference]: Without dead ends: 1174 [2022-11-20 20:15:57,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:15:57,748 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:15:57,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 54 Unchecked, 0.0s Time] [2022-11-20 20:15:57,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-11-20 20:15:57,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2022-11-20 20:15:57,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1166 states have (on average 2.224699828473413) internal successors, (2594), 1173 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:57,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 2594 transitions. [2022-11-20 20:15:57,775 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 2594 transitions. Word has length 35 [2022-11-20 20:15:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:15:57,775 INFO L495 AbstractCegarLoop]: Abstraction has 1174 states and 2594 transitions. [2022-11-20 20:15:57,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:15:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 2594 transitions. [2022-11-20 20:15:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:15:57,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:15:57,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:15:57,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:15:57,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b250830-176d-4ebb-bb8b-b31dd8be4629/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-20 20:15:57,988 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2022-11-20 20:15:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:15:57,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1207038926, now seen corresponding path program 1 times [2022-11-20 20:15:57,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:15:57,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061399040] [2022-11-20 20:15:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:15:57,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:15:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat