./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/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_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/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_94d71852-4cef-464f-93ab-d9520b6ffe49/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 e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- 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 19:59:45,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:59:45,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:59:45,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:59:45,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:59:45,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:59:45,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:59:45,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:59:45,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:59:45,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:59:45,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:59:45,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:59:45,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:59:45,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:59:45,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:59:45,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:59:45,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:59:45,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:59:45,501 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:59:45,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:59:45,505 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:59:45,507 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:59:45,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:59:45,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:59:45,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:59:45,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:59:45,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:59:45,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:59:45,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:59:45,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:59:45,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:59:45,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:59:45,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:59:45,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:59:45,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:59:45,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:59:45,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:59:45,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:59:45,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:59:45,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:59:45,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:59:45,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 19:59:45,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:59:45,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:59:45,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:59:45,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:59:45,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:59:45,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:59:45,562 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:59:45,562 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:59:45,563 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:59:45,563 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:59:45,563 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:59:45,564 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:59:45,564 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:59:45,564 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:59:45,564 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:59:45,565 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:59:45,565 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:59:45,565 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:59:45,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:59:45,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:59:45,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:59:45,567 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:59:45,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:59:45,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:59:45,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:59:45,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:59:45,569 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:59:45,569 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:59:45,569 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:59:45,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:59:45,570 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:59:45,570 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:59:45,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:59:45,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:59:45,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:59:45,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:45,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:59:45,572 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:59:45,572 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:59:45,572 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:59:45,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:59:45,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:59:45,573 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_94d71852-4cef-464f-93ab-d9520b6ffe49/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2022-11-20 19:59:45,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:59:46,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:59:46,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:59:46,008 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:59:46,008 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:59:46,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2022-11-20 19:59:49,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:59:50,183 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:59:50,184 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/sv-benchmarks/c/list-simple/sll2c_update_all.i [2022-11-20 19:59:50,198 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/data/19fd59d8f/bf60cf1f98d744a68282bd8b33ad5c77/FLAG4aab0dad1 [2022-11-20 19:59:50,242 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/data/19fd59d8f/bf60cf1f98d744a68282bd8b33ad5c77 [2022-11-20 19:59:50,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:59:50,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:59:50,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:50,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:59:50,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:59:50,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,276 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78fc1371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50, skipping insertion in model container [2022-11-20 19:59:50,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:59:50,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:59:50,748 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_94d71852-4cef-464f-93ab-d9520b6ffe49/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2022-11-20 19:59:50,751 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:50,764 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:59:50,816 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_94d71852-4cef-464f-93ab-d9520b6ffe49/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2022-11-20 19:59:50,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:59:50,849 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:59:50,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50 WrapperNode [2022-11-20 19:59:50,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:59:50,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:50,852 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:59:50,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:59:50,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,912 INFO L138 Inliner]: procedures = 126, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 133 [2022-11-20 19:59:50,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:59:50,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:59:50,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:59:50,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:59:50,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,950 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:59:50,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:59:50,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:59:50,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:59:50,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (1/1) ... [2022-11-20 19:59:50,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:59:50,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:51,001 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:59:51,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:59:51,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:59:51,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:59:51,067 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-20 19:59:51,067 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-20 19:59:51,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:59:51,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:59:51,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:59:51,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:59:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:59:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:59:51,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:59:51,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:59:51,322 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:59:51,324 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:59:51,704 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:59:51,774 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:59:51,774 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 19:59:51,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:51 BoogieIcfgContainer [2022-11-20 19:59:51,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:59:51,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:59:51,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:59:51,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:59:51,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:59:50" (1/3) ... [2022-11-20 19:59:51,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1affa853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:51, skipping insertion in model container [2022-11-20 19:59:51,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:59:50" (2/3) ... [2022-11-20 19:59:51,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1affa853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:59:51, skipping insertion in model container [2022-11-20 19:59:51,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:59:51" (3/3) ... [2022-11-20 19:59:51,800 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2022-11-20 19:59:51,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:59:51,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-20 19:59:51,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:59:51,904 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;@30d23605, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:59:51,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2022-11-20 19:59:51,911 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:59:51,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:51,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:59:51,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:51,932 INFO L85 PathProgramCache]: Analyzing trace with hash 198170915, now seen corresponding path program 1 times [2022-11-20 19:59:51,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:51,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176865774] [2022-11-20 19:59:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:52,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:52,287 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 19:59:52,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:52,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176865774] [2022-11-20 19:59:52,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176865774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:52,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:52,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:59:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067874455] [2022-11-20 19:59:52,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:52,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:52,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:52,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:59:52,357 INFO L87 Difference]: Start difference. First operand has 65 states, 33 states have (on average 2.121212121212121) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:59:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:52,517 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-11-20 19:59:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:52,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 19:59:52,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:52,531 INFO L225 Difference]: With dead ends: 63 [2022-11-20 19:59:52,532 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 19:59:52,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:59:52,550 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:59:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 19:59:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-20 19:59:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 2.0) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2022-11-20 19:59:52,654 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 5 [2022-11-20 19:59:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:52,655 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2022-11-20 19:59:52,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:59:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2022-11-20 19:59:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:59:52,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:52,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 19:59:52,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:59:52,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:52,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:52,659 INFO L85 PathProgramCache]: Analyzing trace with hash 198170916, now seen corresponding path program 1 times [2022-11-20 19:59:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:52,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463356193] [2022-11-20 19:59:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:52,914 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 19:59:52,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463356193] [2022-11-20 19:59:52,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463356193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:52,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:52,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:59:52,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665433088] [2022-11-20 19:59:52,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:59:52,921 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:59:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:53,081 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-11-20 19:59:53,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 19:59:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:53,091 INFO L225 Difference]: With dead ends: 59 [2022-11-20 19:59:53,092 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 19:59:53,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:59:53,096 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:53,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:59:53,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 19:59:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-20 19:59:53,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.9375) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-20 19:59:53,110 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 5 [2022-11-20 19:59:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:53,111 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-20 19:59:53,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:59:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-20 19:59:53,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:59:53,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:53,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:59:53,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:59:53,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:53,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1927971198, now seen corresponding path program 1 times [2022-11-20 19:59:53,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:53,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316600390] [2022-11-20 19:59:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:53,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:53,297 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 19:59:53,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:53,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316600390] [2022-11-20 19:59:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316600390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:53,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:53,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:59:53,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787093971] [2022-11-20 19:59:53,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:53,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:59:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:59:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:59:53,309 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 19:59:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:53,381 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-11-20 19:59:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:59:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-20 19:59:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:53,384 INFO L225 Difference]: With dead ends: 65 [2022-11-20 19:59:53,384 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 19:59:53,385 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 19:59:53,386 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:53,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:59:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 19:59:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-11-20 19:59:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-11-20 19:59:53,404 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 10 [2022-11-20 19:59:53,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:53,404 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-11-20 19:59:53,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 19:59:53,405 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-11-20 19:59:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:59:53,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:53,406 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:59:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:59:53,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774572, now seen corresponding path program 1 times [2022-11-20 19:59:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:53,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138818082] [2022-11-20 19:59:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:53,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 19:59:53,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:53,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138818082] [2022-11-20 19:59:53,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138818082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:53,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:53,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:59:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065204686] [2022-11-20 19:59:53,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:53,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:59:53,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:53,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:59:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:59:53,753 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 19:59:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:53,984 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2022-11-20 19:59:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:59:53,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-20 19:59:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:53,995 INFO L225 Difference]: With dead ends: 79 [2022-11-20 19:59:53,996 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 19:59:53,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:59:54,005 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:54,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 140 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:59:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 19:59:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-11-20 19:59:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.878787878787879) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-20 19:59:54,027 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 17 [2022-11-20 19:59:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:54,028 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-20 19:59:54,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 19:59:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-20 19:59:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:59:54,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:54,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:59:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:59:54,033 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1377774571, now seen corresponding path program 1 times [2022-11-20 19:59:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:54,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943635896] [2022-11-20 19:59:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:59:54,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:54,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943635896] [2022-11-20 19:59:54,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943635896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:59:54,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:59:54,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:59:54,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940544948] [2022-11-20 19:59:54,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:59:54,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:59:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:59:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:59:54,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:59:54,463 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 19:59:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:59:54,690 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-20 19:59:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:59:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-20 19:59:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:59:54,693 INFO L225 Difference]: With dead ends: 59 [2022-11-20 19:59:54,693 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 19:59:54,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:59:54,694 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:59:54,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 149 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:59:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 19:59:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-20 19:59:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 19:59:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-11-20 19:59:54,702 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 17 [2022-11-20 19:59:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:59:54,703 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-11-20 19:59:54,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 19:59:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-11-20 19:59:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 19:59:54,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:59:54,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:59:54,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:59:54,705 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 19:59:54,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:59:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1191271115, now seen corresponding path program 1 times [2022-11-20 19:59:54,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:59:54,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74608304] [2022-11-20 19:59:54,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:54,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:59:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:59:55,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:59:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74608304] [2022-11-20 19:59:55,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74608304] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:59:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686110222] [2022-11-20 19:59:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:59:55,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:59:55,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:59:55,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:59:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:59:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:59:55,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 19:59:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:59:55,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:59:55,540 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_144 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_144))) is different from true [2022-11-20 19:59:55,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_144 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_144))) is different from true [2022-11-20 19:59:55,613 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:59:55,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-20 19:59:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-20 19:59:55,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:59:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:59:56,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686110222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:59:56,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502690168] [2022-11-20 19:59:56,271 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-20 19:59:56,271 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:59:56,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:59:56,291 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:59:56,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:59:56,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:59:56,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 19:59:56,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 19:59:56,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:59:56,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:59:56,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:59:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:56,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 19:59:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:56,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 19:59:56,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 19:59:57,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 19:59:57,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:59:57,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:59:57,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:59:57,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:59:57,198 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,201 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,205 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,207 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,209 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 19:59:57,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 19:59:57,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:59:57,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 19:59:57,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:59:57,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 19:59:57,662 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,666 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,669 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,671 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,675 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:59:57,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 19:59:57,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 19:59:57,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:57,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 19:59:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:59:58,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 111 [2022-11-20 19:59:58,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:58,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-11-20 19:59:58,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:59:58,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 103 [2022-11-20 19:59:58,513 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 19:59:58,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:01,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '842#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:00:01,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:01,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:01,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2022-11-20 20:00:01,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980899759] [2022-11-20 20:00:01,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:01,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 20:00:01,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 20:00:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=697, Unknown=4, NotChecked=110, Total=930 [2022-11-20 20:00:01,490 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:00:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:01,828 INFO L93 Difference]: Finished difference Result 76 states and 83 transitions. [2022-11-20 20:00:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 20:00:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2022-11-20 20:00:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:01,835 INFO L225 Difference]: With dead ends: 76 [2022-11-20 20:00:01,836 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 20:00:01,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=130, Invalid=744, Unknown=4, NotChecked=114, Total=992 [2022-11-20 20:00:01,837 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 204 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:01,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 276 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 265 Invalid, 0 Unknown, 190 Unchecked, 0.3s Time] [2022-11-20 20:00:01,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 20:00:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2022-11-20 20:00:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-11-20 20:00:01,845 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 19 [2022-11-20 20:00:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:01,846 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-11-20 20:00:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:00:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-11-20 20:00:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:00:01,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:01,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:01,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:02,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:02,056 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:02,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1191271114, now seen corresponding path program 1 times [2022-11-20 20:00:02,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:02,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413151713] [2022-11-20 20:00:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:02,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:02,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:02,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413151713] [2022-11-20 20:00:02,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413151713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:02,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125592978] [2022-11-20 20:00:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:02,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:02,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:02,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:02,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:00:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:02,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 20:00:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:02,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:02,890 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:00:02,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 20:00:02,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:00:02,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:00:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:03,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:03,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125592978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:03,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128856418] [2022-11-20 20:00:03,224 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-20 20:00:03,225 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:03,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:03,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:03,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:03,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:03,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:03,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:03,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:03,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:03,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:03,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:03,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:00:03,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:03,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:03,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:00:03,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:03,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:03,788 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:03,790 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:03,792 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:03,795 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:03,798 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:03,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:00:04,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:04,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:04,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:04,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:00:04,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:04,164 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:04,166 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:04,168 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:04,171 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:04,173 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:04,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:04,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:04,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:04,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:04,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:04,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:04,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:04,698 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:00:04,898 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:07,649 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (< (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:00:07,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:07,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:07,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2022-11-20 20:00:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711899640] [2022-11-20 20:00:07,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:07,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 20:00:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:07,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 20:00:07,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:00:07,654 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:00:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:08,393 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-11-20 20:00:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-11-20 20:00:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:08,395 INFO L225 Difference]: With dead ends: 77 [2022-11-20 20:00:08,396 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 20:00:08,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:00:08,398 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:08,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 285 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 450 Invalid, 0 Unknown, 100 Unchecked, 0.4s Time] [2022-11-20 20:00:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 20:00:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2022-11-20 20:00:08,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-11-20 20:00:08,405 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2022-11-20 20:00:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:08,405 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-11-20 20:00:08,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:00:08,406 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-11-20 20:00:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:00:08,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:08,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:08,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:08,614 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:08,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash 161846627, now seen corresponding path program 1 times [2022-11-20 20:00:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:08,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808813034] [2022-11-20 20:00:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:08,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:00:08,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:08,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808813034] [2022-11-20 20:00:08,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808813034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:08,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:08,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:08,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781443784] [2022-11-20 20:00:08,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:08,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:08,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:08,954 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:09,311 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2022-11-20 20:00:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-20 20:00:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:09,313 INFO L225 Difference]: With dead ends: 116 [2022-11-20 20:00:09,313 INFO L226 Difference]: Without dead ends: 116 [2022-11-20 20:00:09,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:09,314 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 201 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:09,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 251 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:00:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-20 20:00:09,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 59. [2022-11-20 20:00:09,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 55 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:09,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-11-20 20:00:09,322 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 22 [2022-11-20 20:00:09,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:09,323 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-11-20 20:00:09,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:09,323 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-11-20 20:00:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:00:09,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:09,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:09,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:00:09,325 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash 161846628, now seen corresponding path program 1 times [2022-11-20 20:00:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:09,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172447844] [2022-11-20 20:00:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:09,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:09,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172447844] [2022-11-20 20:00:09,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172447844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:09,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:09,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:09,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886459183] [2022-11-20 20:00:09,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:09,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:09,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:09,716 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:10,052 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-11-20 20:00:10,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:10,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-20 20:00:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:10,055 INFO L225 Difference]: With dead ends: 95 [2022-11-20 20:00:10,055 INFO L226 Difference]: Without dead ends: 95 [2022-11-20 20:00:10,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:10,056 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 200 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:10,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 271 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:10,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-20 20:00:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2022-11-20 20:00:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.75) internal successors, (63), 55 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-11-20 20:00:10,061 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 22 [2022-11-20 20:00:10,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:10,062 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-11-20 20:00:10,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,062 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-11-20 20:00:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:10,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:10,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:00:10,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 726869726, now seen corresponding path program 1 times [2022-11-20 20:00:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473532276] [2022-11-20 20:00:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:10,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:10,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473532276] [2022-11-20 20:00:10,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473532276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:10,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:10,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:00:10,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874261817] [2022-11-20 20:00:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:10,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:00:10,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:00:10,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:00:10,179 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:10,279 INFO L93 Difference]: Finished difference Result 125 states and 140 transitions. [2022-11-20 20:00:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-20 20:00:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:10,282 INFO L225 Difference]: With dead ends: 125 [2022-11-20 20:00:10,282 INFO L226 Difference]: Without dead ends: 125 [2022-11-20 20:00:10,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:00:10,283 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:10,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 150 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-20 20:00:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 61. [2022-11-20 20:00:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.736842105263158) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-11-20 20:00:10,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 23 [2022-11-20 20:00:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:10,308 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-11-20 20:00:10,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,309 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-11-20 20:00:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:10,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:10,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:00:10,311 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash 726873298, now seen corresponding path program 1 times [2022-11-20 20:00:10,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:10,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498969632] [2022-11-20 20:00:10,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:10,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 20:00:10,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:10,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498969632] [2022-11-20 20:00:10,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498969632] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:10,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:10,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:10,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186310802] [2022-11-20 20:00:10,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:10,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:10,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:10,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:10,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:10,532 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:10,876 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2022-11-20 20:00:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:10,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-20 20:00:10,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:10,878 INFO L225 Difference]: With dead ends: 109 [2022-11-20 20:00:10,878 INFO L226 Difference]: Without dead ends: 109 [2022-11-20 20:00:10,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:10,879 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 190 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:10,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 229 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:00:10,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-20 20:00:10,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 64. [2022-11-20 20:00:10,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 60 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-11-20 20:00:10,885 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 23 [2022-11-20 20:00:10,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:10,885 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-11-20 20:00:10,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-11-20 20:00:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:00:10,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:10,887 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:10,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 20:00:10,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash 726873299, now seen corresponding path program 1 times [2022-11-20 20:00:10,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:10,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066321240] [2022-11-20 20:00:10,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:00:11,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066321240] [2022-11-20 20:00:11,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066321240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:11,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473486917] [2022-11-20 20:00:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:11,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:00:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:11,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:00:11,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:11,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:00:11,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473486917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:11,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:00:11,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-20 20:00:11,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582065438] [2022-11-20 20:00:11,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:11,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:00:11,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:11,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:00:11,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:11,272 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:11,340 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-20 20:00:11,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:00:11,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-20 20:00:11,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:11,343 INFO L225 Difference]: With dead ends: 80 [2022-11-20 20:00:11,343 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 20:00:11,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:00:11,345 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 63 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:11,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 20:00:11,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-11-20 20:00:11,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:11,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-11-20 20:00:11,354 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 23 [2022-11-20 20:00:11,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:11,356 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-11-20 20:00:11,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-11-20 20:00:11,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:00:11,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:11,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:11,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:11,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:11,571 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:11,572 INFO L85 PathProgramCache]: Analyzing trace with hash 911528901, now seen corresponding path program 1 times [2022-11-20 20:00:11,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:11,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829964848] [2022-11-20 20:00:11,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:11,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:11,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:11,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829964848] [2022-11-20 20:00:11,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829964848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:11,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:11,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:00:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504593203] [2022-11-20 20:00:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:11,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:00:11,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:11,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:00:11,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:00:11,664 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:11,751 INFO L93 Difference]: Finished difference Result 117 states and 135 transitions. [2022-11-20 20:00:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:00:11,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-20 20:00:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:11,753 INFO L225 Difference]: With dead ends: 117 [2022-11-20 20:00:11,754 INFO L226 Difference]: Without dead ends: 117 [2022-11-20 20:00:11,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 20:00:11,755 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:11,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 129 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-20 20:00:11,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 66. [2022-11-20 20:00:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.697674418604651) internal successors, (73), 62 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-20 20:00:11,768 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 24 [2022-11-20 20:00:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:11,768 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-20 20:00:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-20 20:00:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 20:00:11,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:11,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:11,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 20:00:11,770 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:11,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash -271219358, now seen corresponding path program 1 times [2022-11-20 20:00:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:11,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385049018] [2022-11-20 20:00:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:00:12,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:12,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385049018] [2022-11-20 20:00:12,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385049018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:12,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:00:12,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:00:12,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233349950] [2022-11-20 20:00:12,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:12,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:00:12,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:00:12,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:00:12,226 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:12,539 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-11-20 20:00:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:00:12,540 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-20 20:00:12,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:12,541 INFO L225 Difference]: With dead ends: 94 [2022-11-20 20:00:12,541 INFO L226 Difference]: Without dead ends: 94 [2022-11-20 20:00:12,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:00:12,542 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 270 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:12,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 175 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:00:12,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-20 20:00:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2022-11-20 20:00:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2022-11-20 20:00:12,546 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 26 [2022-11-20 20:00:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:12,546 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2022-11-20 20:00:12,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:00:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2022-11-20 20:00:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:00:12,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:12,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:12,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 20:00:12,553 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 35427606, now seen corresponding path program 1 times [2022-11-20 20:00:12,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:12,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322948429] [2022-11-20 20:00:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:13,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322948429] [2022-11-20 20:00:13,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322948429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:13,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792122049] [2022-11-20 20:00:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:13,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:13,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:13,344 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:13,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:00:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-20 20:00:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:13,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:13,603 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:00:13,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:00:13,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:13,656 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:00:13,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-20 20:00:13,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:13,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-20 20:00:13,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:00:13,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:13,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:16,044 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-11-20 20:00:16,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:00:16,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:16,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 20:00:16,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-20 20:00:16,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:16,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792122049] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:16,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [224902975] [2022-11-20 20:00:16,330 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 20:00:16,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:16,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:16,331 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:16,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:16,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:16,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:16,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:16,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:16,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:16,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:16,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:16,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:16,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:16,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:16,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:00:16,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:16,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:16,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:16,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:16,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:16,876 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:16,878 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:16,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:16,885 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:16,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:00:17,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:17,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:17,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:17,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:17,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:17,188 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:17,190 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:17,195 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:17,197 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:17,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:17,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:17,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:17,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:17,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 111 [2022-11-20 20:00:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:17,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-11-20 20:00:17,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:17,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 107 [2022-11-20 20:00:17,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:17,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:17,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:18,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:18,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:18,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:18,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:18,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:18,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:18,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:18,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:18,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:18,516 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:00:18,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:22,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2708#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_update_at_#in~data#1| 4) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_update_at_#in~index#1| 2) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_circular_update_at_~data#1| 4) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 2 |ULTIMATE.start_sll_circular_update_at_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 4) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= 2 |ULTIMATE.start_sll_circular_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:00:22,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:22,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:22,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2022-11-20 20:00:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268297028] [2022-11-20 20:00:22,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:00:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:00:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1508, Unknown=4, NotChecked=0, Total=1640 [2022-11-20 20:00:22,518 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:23,556 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-11-20 20:00:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 20:00:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-20 20:00:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:23,559 INFO L225 Difference]: With dead ends: 168 [2022-11-20 20:00:23,559 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 20:00:23,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=188, Invalid=1970, Unknown=4, NotChecked=0, Total=2162 [2022-11-20 20:00:23,560 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 272 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:23,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 433 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:00:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 20:00:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 80. [2022-11-20 20:00:23,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 56 states have (on average 1.6071428571428572) internal successors, (90), 75 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 20:00:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 96 transitions. [2022-11-20 20:00:23,568 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 96 transitions. Word has length 27 [2022-11-20 20:00:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:23,569 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 96 transitions. [2022-11-20 20:00:23,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 96 transitions. [2022-11-20 20:00:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 20:00:23,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:23,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:23,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:23,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:23,773 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:23,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash 35427607, now seen corresponding path program 1 times [2022-11-20 20:00:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:23,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297581907] [2022-11-20 20:00:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:23,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:00:25,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297581907] [2022-11-20 20:00:25,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297581907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:25,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870748391] [2022-11-20 20:00:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:25,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:25,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:25,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:25,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:00:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 20:00:25,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:25,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:25,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:25,503 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:00:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:00:25,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:25,602 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:00:25,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-20 20:00:25,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 20:00:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:25,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-20 20:00:25,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:25,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 20:00:25,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 20:00:25,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:00:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:00:25,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:26,373 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_745 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4))) (forall ((v_ArrVal_746 (Array Int Int)) (v_ArrVal_745 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_746) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))) is different from false [2022-11-20 20:00:26,399 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:26,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-20 20:00:26,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:26,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 20:00:26,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-11-20 20:00:26,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2022-11-20 20:00:26,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-11-20 20:00:26,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2022-11-20 20:00:26,485 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:00:26,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-20 20:00:26,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:26,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2022-11-20 20:00:28,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870748391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:28,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1723135727] [2022-11-20 20:00:28,840 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 20:00:28,840 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:28,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:28,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:28,841 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:28,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:28,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:28,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:28,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:28,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:28,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:28,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:28,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:29,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:29,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:29,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:29,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:29,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:29,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:00:29,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:00:29,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:29,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:00:29,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:29,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:29,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:29,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:29,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:29,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:29,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:30,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:30,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:30,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:30,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:30,390 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:00:30,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 142 [2022-11-20 20:00:30,437 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:00:30,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 138 [2022-11-20 20:00:30,753 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:00:30,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:36,190 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3131#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (or (not (<= (+ 8 |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_circular_update_at_~head#1.base|))) (not (<= 0 (+ 4 |ULTIMATE.start_sll_circular_update_at_~head#1.offset|)))) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (or (and (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_update_at_~index#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0)) (and (< 0 |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_update_at_#in~index#1| (+ |ULTIMATE.start_sll_circular_update_at_~index#1| 1)) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= (+ |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|)) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|)) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~len~0#1|) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0))) (<= 0 |#NULL.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2022-11-20 20:00:36,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:36,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:00:36,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 20 [2022-11-20 20:00:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022241335] [2022-11-20 20:00:36,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:36,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:00:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:36,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:00:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1746, Unknown=2, NotChecked=84, Total=1980 [2022-11-20 20:00:36,196 INFO L87 Difference]: Start difference. First operand 80 states and 96 transitions. Second operand has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:37,502 INFO L93 Difference]: Finished difference Result 180 states and 209 transitions. [2022-11-20 20:00:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:00:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-20 20:00:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:37,504 INFO L225 Difference]: With dead ends: 180 [2022-11-20 20:00:37,505 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 20:00:37,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=215, Invalid=2237, Unknown=2, NotChecked=96, Total=2550 [2022-11-20 20:00:37,506 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 395 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:37,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 480 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:00:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 20:00:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 85. [2022-11-20 20:00:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.6065573770491803) internal successors, (98), 80 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 20:00:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-11-20 20:00:37,512 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 27 [2022-11-20 20:00:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:37,512 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-11-20 20:00:37,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-11-20 20:00:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 20:00:37,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:37,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:37,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:37,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:00:37,721 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:37,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1351292590, now seen corresponding path program 1 times [2022-11-20 20:00:37,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:37,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068945880] [2022-11-20 20:00:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:37,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:00:37,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:37,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068945880] [2022-11-20 20:00:37,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068945880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:37,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806935470] [2022-11-20 20:00:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:37,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:37,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:37,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:00:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:00:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:38,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:38,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806935470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:38,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014924609] [2022-11-20 20:00:38,229 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-20 20:00:38,229 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:38,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:38,230 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:38,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:38,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:38,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:38,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:38,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:38,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:38,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:38,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:38,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:38,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:38,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:38,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:38,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:38,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:38,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:38,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:38,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:38,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:38,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:38,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:39,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:39,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:39,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:39,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:39,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:39,248 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:00:39,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:00:39,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:39,300 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:00:39,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:00:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,385 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:39,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:00:39,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 20:00:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,444 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:39,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:00:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,762 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:39,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 335 [2022-11-20 20:00:39,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,813 INFO L321 Elim1Store]: treesize reduction 29, result has 9.4 percent of original size [2022-11-20 20:00:39,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 350 treesize of output 327 [2022-11-20 20:00:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:39,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:39,854 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:39,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 313 [2022-11-20 20:00:40,140 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 79 for LOIs [2022-11-20 20:00:40,400 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:47,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2014924609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:00:47,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:47,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [6, 5, 5] total 23 [2022-11-20 20:00:47,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559567502] [2022-11-20 20:00:47,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:00:47,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:00:47,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:47,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:00:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:00:47,919 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:49,464 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2022-11-20 20:00:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:00:49,465 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-20 20:00:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:49,466 INFO L225 Difference]: With dead ends: 78 [2022-11-20 20:00:49,466 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 20:00:49,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:00:49,467 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:49,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 182 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 418 Invalid, 0 Unknown, 184 Unchecked, 1.0s Time] [2022-11-20 20:00:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 20:00:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-20 20:00:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 74 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2022-11-20 20:00:49,472 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 28 [2022-11-20 20:00:49,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:49,473 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2022-11-20 20:00:49,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:49,473 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2022-11-20 20:00:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 20:00:49,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:49,474 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:49,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:00:49,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:00:49,681 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:00:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:00:49,681 INFO L85 PathProgramCache]: Analyzing trace with hash -318065992, now seen corresponding path program 2 times [2022-11-20 20:00:49,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:00:49,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793016618] [2022-11-20 20:00:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:00:49,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:00:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:00:49,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:00:49,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:00:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793016618] [2022-11-20 20:00:49,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793016618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:00:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574860449] [2022-11-20 20:00:49,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:00:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:00:49,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:00:49,824 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:00:49,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:00:50,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:00:50,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:00:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:00:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:00:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:00:50,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:00:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:00:50,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574860449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:00:50,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946419083] [2022-11-20 20:00:50,365 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 20:00:50,365 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:00:50,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:00:50,366 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:00:50,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:00:50,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:00:50,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:00:50,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:50,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:00:50,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:00:50,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:50,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:50,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:50,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:00:50,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:50,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:50,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:50,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:50,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:50,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:50,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:00:50,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:50,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:50,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:00:51,064 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,066 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,070 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,072 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:51,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:51,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:00:51,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:51,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:51,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,395 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,398 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,400 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,402 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,405 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:51,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:51,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:00:51,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:51,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:00:51,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:51,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 214 [2022-11-20 20:00:51,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:00:51,879 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,882 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,884 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,886 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,888 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:51,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:51,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:52,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:00:52,140 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:52,143 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:52,144 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:52,147 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:52,150 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:00:52,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:52,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:52,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:52,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:00:52,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:00:52,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:00:52,481 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:00:52,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:00:52,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:00:52,544 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:00:52,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:00:52,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:52,650 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:52,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:00:52,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:52,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:52,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 20:00:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:00:52,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:00:52,712 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:00:52,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:00:52,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:53,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:53,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:53,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:53,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:00:53,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:00:53,346 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 75 for LOIs [2022-11-20 20:00:53,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:00:59,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3942#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_update_at_#in~data#1| 4) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (<= |ULTIMATE.start_sll_circular_update_at_#in~index#1| 2) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_circular_update_at_~data#1| 4) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 2 |ULTIMATE.start_sll_circular_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 4) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= 2 |ULTIMATE.start_sll_circular_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:00:59,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:00:59,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:00:59,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2022-11-20 20:00:59,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529613167] [2022-11-20 20:00:59,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:00:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:00:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:00:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:00:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:00:59,543 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:00:59,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:00:59,792 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2022-11-20 20:00:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:00:59,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-20 20:00:59,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:00:59,793 INFO L225 Difference]: With dead ends: 97 [2022-11-20 20:00:59,793 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 20:00:59,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:00:59,795 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 200 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:00:59,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 124 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:00:59,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 20:00:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-11-20 20:00:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 63 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:00:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-20 20:00:59,799 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 29 [2022-11-20 20:00:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:00:59,800 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-20 20:00:59,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:00:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-20 20:00:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 20:00:59,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:00:59,801 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:00:59,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:00,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:00,010 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:00,010 INFO L85 PathProgramCache]: Analyzing trace with hash 950037827, now seen corresponding path program 3 times [2022-11-20 20:01:00,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:00,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244817907] [2022-11-20 20:01:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:00,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:01:00,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:00,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244817907] [2022-11-20 20:01:00,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244817907] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:00,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320086662] [2022-11-20 20:01:00,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:01:00,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:00,216 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:00,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:01:00,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:01:00,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:01:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:01:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:01:00,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:01:00,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320086662] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:00,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [854349872] [2022-11-20 20:01:00,582 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-20 20:01:00,583 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:00,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:00,584 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:00,584 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:00,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:00,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:00,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:00,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:00,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:00,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:00,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:00,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:00,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:00,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:00,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:00,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:00,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:00,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:00,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:00,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:00,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:01,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:01,211 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,213 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,214 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,217 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,219 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:01,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:01,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:01,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:01,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:01,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:01,600 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,602 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,604 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,606 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:01,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:01,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:01:01,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:01,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:01:01,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:01,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:01:01,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:02,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:02,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:02,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,067 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,070 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,073 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,075 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:02,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:02,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:02,355 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,357 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,360 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:02,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:02,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:02,596 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:02,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:02,632 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:02,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,759 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:02,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:02,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:02,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:02,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 20:01:02,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:02,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:02,822 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:02,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:03,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:03,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:03,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:03,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:03,497 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:01:03,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 154 [2022-11-20 20:01:03,542 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:01:03,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 156 treesize of output 150 [2022-11-20 20:01:03,851 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 75 for LOIs [2022-11-20 20:01:04,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:10,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4330#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_update_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (or (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~index#1| (+ |ULTIMATE.start_sll_circular_update_at_~index#1| 1)) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= (+ |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|)) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_update_at_#in~head#1.base|) |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (< 0 (+ |ULTIMATE.start_sll_circular_update_at_~index#1| 1)) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset| |ULTIMATE.start_sll_circular_update_at_~head#1.offset|) (= |ULTIMATE.start_sll_circular_update_at_#in~head#1.base| |ULTIMATE.start_sll_circular_update_at_~head#1.base|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_update_at_~index#1| |ULTIMATE.start_sll_circular_update_at_#in~index#1|) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_sll_circular_update_at_~data#1|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_update_at_#in~data#1| |ULTIMATE.start_main_~new_data~0#1|) (= |#NULL.base| 0))) (<= 0 |ULTIMATE.start_sll_circular_update_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0))' at error location [2022-11-20 20:01:10,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:10,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:10,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-11-20 20:01:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770422491] [2022-11-20 20:01:10,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:10,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:01:10,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:01:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=657, Unknown=3, NotChecked=0, Total=756 [2022-11-20 20:01:10,932 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:01:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:11,236 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-11-20 20:01:11,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:01:11,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-11-20 20:01:11,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:11,237 INFO L225 Difference]: With dead ends: 90 [2022-11-20 20:01:11,237 INFO L226 Difference]: Without dead ends: 90 [2022-11-20 20:01:11,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=130, Invalid=858, Unknown=4, NotChecked=0, Total=992 [2022-11-20 20:01:11,239 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 154 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:11,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 310 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:01:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-20 20:01:11,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2022-11-20 20:01:11,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:11,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-20 20:01:11,243 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 32 [2022-11-20 20:01:11,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:11,243 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-20 20:01:11,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 20:01:11,243 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-20 20:01:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 20:01:11,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:11,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:11,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:11,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:11,448 INFO L85 PathProgramCache]: Analyzing trace with hash -360561631, now seen corresponding path program 1 times [2022-11-20 20:01:11,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:11,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83991488] [2022-11-20 20:01:11,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:12,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83991488] [2022-11-20 20:01:12,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83991488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:12,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729328321] [2022-11-20 20:01:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:12,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:12,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:12,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:01:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:13,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 20:01:13,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:13,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:13,347 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:01:13,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:01:13,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:13,516 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:01:13,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 20:01:13,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:13,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 20:01:13,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 20:01:13,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 20:01:14,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-20 20:01:14,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:01:14,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:14,283 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1154 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1154 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1154) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) (+ |c_ULTIMATE.start_main_~len~0#1| 1))))) is different from false [2022-11-20 20:01:14,307 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1154 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| .cse0 v_ArrVal_1154) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_1154 (Array Int Int))) (< (select (select (store |c_#memory_int| .cse0 v_ArrVal_1154) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) (+ |c_ULTIMATE.start_main_~len~0#1| 1))))) is different from false [2022-11-20 20:01:14,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:14,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2022-11-20 20:01:14,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:14,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2022-11-20 20:01:14,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-20 20:01:14,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:14,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2022-11-20 20:01:14,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:14,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2022-11-20 20:01:14,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-20 20:01:14,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:14,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-20 20:01:14,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-11-20 20:01:14,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:01:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-20 20:01:15,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729328321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:15,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666054938] [2022-11-20 20:01:15,495 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:01:15,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:15,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:15,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:15,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:15,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:15,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:15,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:15,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:15,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:15,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:15,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:15,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:15,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:01:15,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:15,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:15,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:15,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:15,905 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:15,907 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:15,909 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:15,911 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:15,913 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:15,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:01:16,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:16,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:01:16,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:16,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:16,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:16,103 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:16,105 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:16,107 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:16,110 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:16,111 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:16,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:16,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:16,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:16,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:16,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 111 [2022-11-20 20:01:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:16,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-11-20 20:01:16,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:16,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 107 [2022-11-20 20:01:16,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:16,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:16,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:16,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:16,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:16,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:16,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:16,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:16,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:16,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:17,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:17,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:17,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:17,230 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:01:17,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:23,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4757#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4))) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_sll_circular_get_data_at_~index#1| |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (= |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_get_data_at_~head#1.base| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base|) (= |#NULL.base| 0))' at error location [2022-11-20 20:01:23,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:23,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:23,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 56 [2022-11-20 20:01:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976469550] [2022-11-20 20:01:23,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:23,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 20:01:23,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 20:01:23,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=4943, Unknown=27, NotChecked=286, Total=5550 [2022-11-20 20:01:23,125 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 56 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 48 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 20:01:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:25,004 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2022-11-20 20:01:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:01:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 48 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 33 [2022-11-20 20:01:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:25,006 INFO L225 Difference]: With dead ends: 88 [2022-11-20 20:01:25,006 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 20:01:25,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=463, Invalid=6999, Unknown=28, NotChecked=342, Total=7832 [2022-11-20 20:01:25,009 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 356 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:25,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 964 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 910 Invalid, 0 Unknown, 234 Unchecked, 0.7s Time] [2022-11-20 20:01:25,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 20:01:25,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2022-11-20 20:01:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.434782608695652) internal successors, (66), 61 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-20 20:01:25,013 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 33 [2022-11-20 20:01:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:25,014 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-20 20:01:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 48 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 20:01:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-20 20:01:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:01:25,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:25,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:25,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:25,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:25,228 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:25,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1395084288, now seen corresponding path program 1 times [2022-11-20 20:01:25,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:25,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458083084] [2022-11-20 20:01:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:25,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:01:25,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:25,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458083084] [2022-11-20 20:01:25,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458083084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:25,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:01:25,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:01:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805212048] [2022-11-20 20:01:25,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:01:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:01:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:01:25,493 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:01:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:25,733 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-11-20 20:01:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:01:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-20 20:01:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:25,735 INFO L225 Difference]: With dead ends: 82 [2022-11-20 20:01:25,735 INFO L226 Difference]: Without dead ends: 82 [2022-11-20 20:01:25,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:01:25,736 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:25,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 138 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:01:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-20 20:01:25,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2022-11-20 20:01:25,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2022-11-20 20:01:25,740 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 35 [2022-11-20 20:01:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:25,741 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2022-11-20 20:01:25,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:01:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2022-11-20 20:01:25,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 20:01:25,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:25,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:25,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 20:01:25,742 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:25,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1395084289, now seen corresponding path program 1 times [2022-11-20 20:01:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:25,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948350612] [2022-11-20 20:01:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:25,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:01:25,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:25,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948350612] [2022-11-20 20:01:25,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948350612] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:25,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301957461] [2022-11-20 20:01:25,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:25,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:25,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:25,910 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:25,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:01:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 20:01:26,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:01:26,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:01:26,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301957461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:26,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761468601] [2022-11-20 20:01:26,307 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 20:01:26,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:26,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:26,311 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:26,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:26,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:26,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:26,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:26,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:26,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:26,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:26,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:26,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:26,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:26,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:26,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:26,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:26,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:26,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:26,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:26,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:26,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:27,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:01:27,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:01:27,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:01:27,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:27,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:27,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:27,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:27,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:27,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:27,373 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:27,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:27,408 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:27,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:27,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:27,490 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:27,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:27,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 20:01:27,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:27,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:27,549 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:27,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:27,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:27,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:27,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:27,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:27,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:27,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:28,192 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 79 for LOIs [2022-11-20 20:01:28,458 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1761468601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:01:35,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:35,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [6, 5, 5] total 28 [2022-11-20 20:01:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399486464] [2022-11-20 20:01:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:01:35,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:01:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:35,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:01:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:01:35,316 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:38,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:38,605 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-11-20 20:01:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:01:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-20 20:01:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:38,609 INFO L225 Difference]: With dead ends: 72 [2022-11-20 20:01:38,609 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 20:01:38,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-11-20 20:01:38,610 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:38,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 186 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 467 Invalid, 0 Unknown, 196 Unchecked, 0.8s Time] [2022-11-20 20:01:38,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 20:01:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-20 20:01:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2022-11-20 20:01:38,619 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 35 [2022-11-20 20:01:38,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:38,621 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2022-11-20 20:01:38,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2022-11-20 20:01:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:01:38,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:38,622 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:38,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:38,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 20:01:38,834 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash 534644488, now seen corresponding path program 1 times [2022-11-20 20:01:38,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:38,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067356826] [2022-11-20 20:01:38,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:38,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:01:38,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067356826] [2022-11-20 20:01:38,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067356826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:38,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604357834] [2022-11-20 20:01:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:38,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:38,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:38,954 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:38,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:01:39,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 20:01:39,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:01:39,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:01:39,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604357834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:39,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788348731] [2022-11-20 20:01:39,264 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:01:39,264 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:39,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:39,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:39,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:39,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:39,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:39,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:39,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:39,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:39,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:39,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:39,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:39,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:39,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:39,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:39,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:39,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:39,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:39,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:39,849 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:39,851 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:39,852 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:39,854 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:39,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:40,045 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,047 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,049 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,051 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:40,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:40,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:40,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:40,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:40,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,476 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,478 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,480 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,481 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:40,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:40,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:40,718 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,722 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,723 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,726 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:40,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 191 [2022-11-20 20:01:40,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:40,966 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:40,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:40,996 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:01:40,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:41,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:41,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:41,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-20 20:01:41,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:41,102 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:41,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:41,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:41,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:41,133 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:01:41,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:01:41,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:41,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:41,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:41,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:41,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:41,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:42,512 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 75 for LOIs [2022-11-20 20:01:42,746 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:01:49,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5728#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (< 0 |ULTIMATE.start_sll_circular_get_data_at_~index#1|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:01:49,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:01:49,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:01:49,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-20 20:01:49,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462158222] [2022-11-20 20:01:49,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:01:49,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 20:01:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:01:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 20:01:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=626, Unknown=1, NotChecked=0, Total=702 [2022-11-20 20:01:49,319 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:01:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:01:49,497 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-11-20 20:01:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:01:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-20 20:01:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:01:49,498 INFO L225 Difference]: With dead ends: 66 [2022-11-20 20:01:49,498 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 20:01:49,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=94, Invalid=775, Unknown=1, NotChecked=0, Total=870 [2022-11-20 20:01:49,499 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:01:49,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 127 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:01:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 20:01:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-20 20:01:49,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.36) internal successors, (68), 62 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:01:49,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2022-11-20 20:01:49,503 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 37 [2022-11-20 20:01:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:01:49,503 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2022-11-20 20:01:49,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:01:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2022-11-20 20:01:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:01:49,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:01:49,504 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:01:49,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:01:49,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:49,711 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:01:49,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:01:49,712 INFO L85 PathProgramCache]: Analyzing trace with hash 534648060, now seen corresponding path program 1 times [2022-11-20 20:01:49,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:01:49,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883008031] [2022-11-20 20:01:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:49,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:01:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:01:50,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:01:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883008031] [2022-11-20 20:01:50,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883008031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:01:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039321025] [2022-11-20 20:01:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:01:50,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:01:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:01:50,638 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:01:50,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:01:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:01:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-20 20:01:50,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:01:50,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:50,876 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:01:50,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:01:50,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:50,926 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:01:50,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 20:01:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:51,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 20:01:51,116 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:01:51,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-20 20:01:51,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:01:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:01:51,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:01:51,261 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-11-20 20:01:51,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:01:51,266 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1526 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1526) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2022-11-20 20:01:51,277 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1526 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1526) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2022-11-20 20:01:51,286 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1526 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1526) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0))) is different from false [2022-11-20 20:01:51,381 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1526 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| Int) (v_ArrVal_1525 Int)) (or (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| 4) v_ArrVal_1525))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) .cse1 v_ArrVal_1526) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse1))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2022-11-20 20:01:51,397 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1526 (Array Int Int)) (v_ArrVal_1523 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| Int) (v_ArrVal_1525 Int)) (or (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1523))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| 4) v_ArrVal_1525))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (= (select (select (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1) .cse2 v_ArrVal_1526) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse2)))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_92| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2022-11-20 20:01:51,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:01:51,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 59 [2022-11-20 20:01:51,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 86 [2022-11-20 20:01:51,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:51,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-11-20 20:01:51,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:01:51,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-20 20:01:51,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-11-20 20:01:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2022-11-20 20:01:51,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039321025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:01:51,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527854117] [2022-11-20 20:01:51,938 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:01:51,939 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:01:51,939 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:01:51,939 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:01:51,939 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:01:51,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:01:51,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:01:51,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:51,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:51,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:51,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:51,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:52,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:01:52,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:52,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:01:52,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:52,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:52,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:52,280 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,282 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,284 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,286 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,288 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:01:52,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:52,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:52,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:52,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:01:52,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:01:52,494 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,496 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,498 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,500 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:01:52,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:52,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:52,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:01:52,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:01:52,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:52,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:52,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:52,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:01:52,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:52,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:01:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:01:53,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:01:53,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:53,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:53,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:53,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:53,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:01:53,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:53,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:01:54,335 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:01:54,478 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:00,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6142#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:00,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:00,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:00,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 39 [2022-11-20 20:02:00,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700450694] [2022-11-20 20:02:00,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:00,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:02:00,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:00,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:02:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2768, Unknown=16, NotChecked=550, Total=3540 [2022-11-20 20:02:00,259 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 40 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:02:01,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:01,418 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-11-20 20:02:01,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:02:01,418 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2022-11-20 20:02:01,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:01,419 INFO L225 Difference]: With dead ends: 81 [2022-11-20 20:02:01,419 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 20:02:01,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=293, Invalid=3743, Unknown=16, NotChecked=640, Total=4692 [2022-11-20 20:02:01,420 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 121 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:01,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 619 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 818 Invalid, 0 Unknown, 356 Unchecked, 0.5s Time] [2022-11-20 20:02:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 20:02:01,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2022-11-20 20:02:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.34) internal successors, (67), 61 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:01,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-11-20 20:02:01,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 37 [2022-11-20 20:02:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:01,423 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-11-20 20:02:01,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:02:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-11-20 20:02:01,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:02:01,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:01,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:01,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 20:02:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 20:02:01,630 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash 534648061, now seen corresponding path program 1 times [2022-11-20 20:02:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268121686] [2022-11-20 20:02:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:02:03,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268121686] [2022-11-20 20:02:03,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268121686] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:03,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105915557] [2022-11-20 20:02:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:03,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:03,080 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:03,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:02:03,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-20 20:02:03,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:03,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:03,567 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:02:03,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:02:03,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:03,728 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:02:03,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 20:02:03,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:03,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 20:02:03,993 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:02:03,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-11-20 20:02:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:04,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-20 20:02:04,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-20 20:02:04,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-20 20:02:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 20:02:04,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:04,397 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:04,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-11-20 20:02:04,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:04,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 97 [2022-11-20 20:02:04,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2022-11-20 20:02:04,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 75 [2022-11-20 20:02:04,879 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1635 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1635) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2022-11-20 20:02:04,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:04,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2022-11-20 20:02:04,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-11-20 20:02:04,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:02:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 1 not checked. [2022-11-20 20:02:05,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105915557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:05,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [963469112] [2022-11-20 20:02:05,497 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:02:05,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:05,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:05,499 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:05,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:05,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:05,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:05,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:05,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:05,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:05,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:05,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:05,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:05,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:02:05,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:05,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:05,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:05,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:05,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:05,891 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:05,892 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:05,894 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:05,896 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:05,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:02:06,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:02:06,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:06,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:06,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:06,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:06,135 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:06,137 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:06,139 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:06,142 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:06,144 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:06,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:06,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:02:06,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:06,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 108 [2022-11-20 20:02:06,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:06,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 108 [2022-11-20 20:02:06,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:06,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 100 [2022-11-20 20:02:06,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:06,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:06,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:06,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:06,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:06,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:06,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:06,893 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:02:06,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 144 [2022-11-20 20:02:06,934 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:02:06,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 140 [2022-11-20 20:02:07,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:07,876 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:02:08,006 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:15,202 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6603#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (or (not (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4)))) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:15,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:15,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:15,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 53 [2022-11-20 20:02:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235017394] [2022-11-20 20:02:15,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 20:02:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 20:02:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=4966, Unknown=4, NotChecked=142, Total=5402 [2022-11-20 20:02:15,205 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 54 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:02:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:17,032 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-20 20:02:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 20:02:17,032 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 37 [2022-11-20 20:02:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:17,033 INFO L225 Difference]: With dead ends: 71 [2022-11-20 20:02:17,033 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 20:02:17,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=443, Invalid=6529, Unknown=4, NotChecked=164, Total=7140 [2022-11-20 20:02:17,036 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:17,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 669 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 960 Invalid, 0 Unknown, 167 Unchecked, 0.7s Time] [2022-11-20 20:02:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 20:02:17,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-11-20 20:02:17,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:17,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-20 20:02:17,040 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 37 [2022-11-20 20:02:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:17,040 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-20 20:02:17,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 47 states have (on average 2.021276595744681) internal successors, (95), 45 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 20:02:17,041 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-20 20:02:17,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 20:02:17,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:17,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:17,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:17,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 20:02:17,251 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:17,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:17,252 INFO L85 PathProgramCache]: Analyzing trace with hash 538075817, now seen corresponding path program 1 times [2022-11-20 20:02:17,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:17,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385051887] [2022-11-20 20:02:17,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:17,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:02:17,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385051887] [2022-11-20 20:02:17,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385051887] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792378588] [2022-11-20 20:02:17,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:17,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:17,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:17,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:17,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:02:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 20:02:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:02:17,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:02:17,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792378588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:17,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813586430] [2022-11-20 20:02:17,728 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-20 20:02:17,728 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:17,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:17,729 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:17,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:17,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:17,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:17,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:17,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:17,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:17,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:17,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:17,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:17,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:17,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:17,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:17,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:17,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:18,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:18,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:18,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:18,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:18,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:18,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:18,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:02:18,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:18,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:02:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:18,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:02:18,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:18,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:18,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:18,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:18,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:18,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:18,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:18,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:18,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:18,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:18,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:18,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:18,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:19,028 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:02:19,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:22,406 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7011#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~s~0#1.offset| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4))) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_sll_circular_get_data_at_~index#1| |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |ULTIMATE.start_sll_circular_get_data_at_~head#1.base| |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.base|) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:22,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:22,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:22,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-20 20:02:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907958163] [2022-11-20 20:02:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:22,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:02:22,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:02:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=543, Unknown=1, NotChecked=0, Total=650 [2022-11-20 20:02:22,408 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:22,496 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-11-20 20:02:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:02:22,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-11-20 20:02:22,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:22,497 INFO L225 Difference]: With dead ends: 67 [2022-11-20 20:02:22,497 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 20:02:22,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=111, Invalid=590, Unknown=1, NotChecked=0, Total=702 [2022-11-20 20:02:22,498 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:22,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 119 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:02:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 20:02:22,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-20 20:02:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-20 20:02:22,501 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 37 [2022-11-20 20:02:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:22,502 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-20 20:02:22,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-20 20:02:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-20 20:02:22,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:22,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:22,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:22,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:22,709 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:22,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1599198327, now seen corresponding path program 1 times [2022-11-20 20:02:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:22,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333893677] [2022-11-20 20:02:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:22,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:02:24,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333893677] [2022-11-20 20:02:24,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333893677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:24,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319873953] [2022-11-20 20:02:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:24,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:24,551 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:24,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:02:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-20 20:02:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:24,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:24,986 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:02:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:02:25,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:25,155 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:02:25,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 20:02:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:25,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 20:02:25,544 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:02:25,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-11-20 20:02:25,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-20 20:02:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:25,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 20:02:25,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2022-11-20 20:02:25,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2022-11-20 20:02:25,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-11-20 20:02:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:02:26,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:26,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2022-11-20 20:02:26,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 56 [2022-11-20 20:02:26,409 WARN L837 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~len~0#1| 1) |c_ULTIMATE.start_sll_circular_update_at_~data#1|) (< |c_ULTIMATE.start_sll_circular_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 2)) (forall ((v_ArrVal_1855 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1855) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (forall ((v_ArrVal_1858 (Array Int Int))) (= |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_1858) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) is different from false [2022-11-20 20:02:26,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:26,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-20 20:02:26,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-20 20:02:26,843 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1852 (Array Int Int)) (v_ArrVal_1853 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_117| Int)) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1852) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_117| 4) v_ArrVal_1853) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_117| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) is different from false [2022-11-20 20:02:26,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:26,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-20 20:02:26,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-20 20:02:26,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:26,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-20 20:02:26,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:26,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-20 20:02:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-20 20:02:27,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319873953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:27,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875083046] [2022-11-20 20:02:27,428 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-20 20:02:27,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:27,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:27,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:27,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:27,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:27,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:27,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:27,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:27,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:27,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:27,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:27,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:27,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:27,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:27,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:27,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:27,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:27,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:27,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:27,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:27,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:27,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:02:27,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:27,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:02:27,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:02:27,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:27,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:02:27,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:27,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:28,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:28,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:28,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:28,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:28,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:28,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:28,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:28,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:28,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:28,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:28,844 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:02:28,982 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:34,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7458#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4))) (not (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4)) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:34,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:34,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:34,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 23] total 63 [2022-11-20 20:02:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590775262] [2022-11-20 20:02:34,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 20:02:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:34,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 20:02:34,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=6325, Unknown=3, NotChecked=322, Total=6972 [2022-11-20 20:02:34,322 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 63 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 55 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 20:02:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:37,317 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2022-11-20 20:02:37,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 20:02:37,317 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 55 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 39 [2022-11-20 20:02:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:37,318 INFO L225 Difference]: With dead ends: 65 [2022-11-20 20:02:37,318 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 20:02:37,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=574, Invalid=9531, Unknown=3, NotChecked=398, Total=10506 [2022-11-20 20:02:37,320 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 302 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:37,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 760 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1066 Invalid, 0 Unknown, 198 Unchecked, 0.7s Time] [2022-11-20 20:02:37,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 20:02:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 20:02:37,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-11-20 20:02:37,323 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 39 [2022-11-20 20:02:37,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:37,323 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-11-20 20:02:37,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 55 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 20:02:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-11-20 20:02:37,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 20:02:37,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:37,324 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:37,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:02:37,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 20:02:37,524 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash 771160425, now seen corresponding path program 1 times [2022-11-20 20:02:37,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779963104] [2022-11-20 20:02:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:02:37,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:37,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779963104] [2022-11-20 20:02:37,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779963104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:37,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:02:37,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:02:37,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531142208] [2022-11-20 20:02:37,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:37,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:02:37,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:37,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:02:37,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:02:37,843 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:38,042 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-11-20 20:02:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:02:38,042 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-20 20:02:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:38,043 INFO L225 Difference]: With dead ends: 63 [2022-11-20 20:02:38,043 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 20:02:38,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:02:38,044 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 115 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:38,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 80 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:02:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 20:02:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 20:02:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-20 20:02:38,046 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 41 [2022-11-20 20:02:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:38,046 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-20 20:02:38,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-20 20:02:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 20:02:38,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:38,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:38,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 20:02:38,047 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1863796756, now seen corresponding path program 1 times [2022-11-20 20:02:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624444288] [2022-11-20 20:02:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:02:38,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624444288] [2022-11-20 20:02:38,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624444288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:02:38,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:02:38,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 20:02:38,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131679866] [2022-11-20 20:02:38,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:02:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:02:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:02:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:02:38,188 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:38,334 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-11-20 20:02:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:02:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-20 20:02:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:38,335 INFO L225 Difference]: With dead ends: 63 [2022-11-20 20:02:38,335 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 20:02:38,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:02:38,336 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:38,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 105 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:02:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 20:02:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 20:02:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.196078431372549) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-11-20 20:02:38,338 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 42 [2022-11-20 20:02:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:38,339 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-11-20 20:02:38,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:02:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-11-20 20:02:38,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:02:38,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:38,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:38,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 20:02:38,340 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1944100749, now seen corresponding path program 1 times [2022-11-20 20:02:38,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:38,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752446048] [2022-11-20 20:02:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:38,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:02:38,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:38,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752446048] [2022-11-20 20:02:38,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752446048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:38,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772797133] [2022-11-20 20:02:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:38,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:38,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:38,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:38,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 20:02:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 20:02:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:39,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 20:02:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 20:02:39,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:39,107 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-20 20:02:39,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-20 20:02:39,156 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-11-20 20:02:39,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:02:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-20 20:02:39,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772797133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:02:39,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114331900] [2022-11-20 20:02:39,239 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 20:02:39,240 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:39,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:39,240 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:39,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:39,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:39,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:39,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:39,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:39,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:39,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:39,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:39,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:39,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:39,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:39,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:39,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:39,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:39,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:39,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:39,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:02:39,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:39,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:02:39,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:39,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 214 [2022-11-20 20:02:39,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:39,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:39,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:39,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:02:39,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:39,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:39,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:40,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:40,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:40,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:40,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:40,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:40,261 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:02:40,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 142 [2022-11-20 20:02:40,298 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:02:40,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 138 [2022-11-20 20:02:41,420 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:02:41,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:02:48,579 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8207#(and (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (not (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4))) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (<= (+ |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (not (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~len~0#1|)) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4)) (= |#NULL.base| 0))' at error location [2022-11-20 20:02:48,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:02:48,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:02:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 6] total 20 [2022-11-20 20:02:48,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848876005] [2022-11-20 20:02:48,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:02:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:02:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:02:48,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:02:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 20:02:48,581 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:02:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:02:49,011 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-20 20:02:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:02:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2022-11-20 20:02:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:02:49,012 INFO L225 Difference]: With dead ends: 70 [2022-11-20 20:02:49,012 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 20:02:49,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=315, Invalid=2655, Unknown=0, NotChecked=0, Total=2970 [2022-11-20 20:02:49,013 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 325 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:02:49,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 153 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:02:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 20:02:49,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-11-20 20:02:49,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:02:49,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-11-20 20:02:49,016 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 43 [2022-11-20 20:02:49,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:02:49,016 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-11-20 20:02:49,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 20 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-20 20:02:49,016 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-11-20 20:02:49,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 20:02:49,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:02:49,017 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:02:49,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-20 20:02:49,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:49,218 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:02:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:02:49,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1944100748, now seen corresponding path program 1 times [2022-11-20 20:02:49,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:02:49,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475351058] [2022-11-20 20:02:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:49,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:02:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:02:50,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:02:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475351058] [2022-11-20 20:02:50,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475351058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:50,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133547898] [2022-11-20 20:02:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:02:50,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:02:50,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:02:50,466 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:02:50,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:02:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:02:50,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-20 20:02:50,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:02:50,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:50,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:02:50,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:02:50,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:50,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:50,913 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:02:50,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-20 20:02:50,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 20:02:51,032 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:02:51,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-11-20 20:02:51,047 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-20 20:02:51,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2022-11-20 20:02:51,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:51,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2022-11-20 20:02:51,309 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 20:02:51,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-11-20 20:02:51,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-20 20:02:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:51,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:51,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2022-11-20 20:02:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 20:02:51,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:02:52,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2022-11-20 20:02:52,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-20 20:02:52,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 63 [2022-11-20 20:02:52,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 47 [2022-11-20 20:02:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2022-11-20 20:02:52,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 192 [2022-11-20 20:02:52,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:52,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2022-11-20 20:02:52,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:52,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2022-11-20 20:02:52,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:52,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:02:52,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 128 [2022-11-20 20:02:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:52,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2022-11-20 20:02:52,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 94 [2022-11-20 20:02:53,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133547898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:02:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536751932] [2022-11-20 20:02:53,372 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-20 20:02:53,373 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:02:53,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:02:53,373 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:02:53,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:02:53,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:02:53,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:02:53,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:53,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:53,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:53,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:53,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:53,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:53,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:53,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:02:53,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:53,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:53,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:53,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:53,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:53,747 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,748 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,751 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,753 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:02:53,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:02:53,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:53,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:02:53,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:02:53,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:53,989 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,991 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,992 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,994 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:53,995 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:02:54,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:54,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 204 [2022-11-20 20:02:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:54,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 206 [2022-11-20 20:02:54,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:02:54,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 222 [2022-11-20 20:02:54,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:54,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:02:54,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:02:54,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:54,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:02:54,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:02:54,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:54,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:54,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:02:54,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:02:54,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:54,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:54,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:54,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:02:54,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:54,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:02:55,710 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:02:55,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:03,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8649#(and (<= |ULTIMATE.start_main_~expected~0#1| 2147483647) (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |#NULL.base|) (<= 2 |ULTIMATE.start_main_~len~0#1|) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 2 |ULTIMATE.start_sll_circular_get_data_at_#res#1|) (<= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#res#1| 2147483647) (<= 2 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |#NULL.base| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 1 |ULTIMATE.start_main_~data~0#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4)))' at error location [2022-11-20 20:03:03,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:03,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:03,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 35 [2022-11-20 20:03:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581854983] [2022-11-20 20:03:03,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:03,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 20:03:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:03,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 20:03:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=5342, Unknown=38, NotChecked=0, Total=5700 [2022-11-20 20:03:03,171 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:04,726 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-11-20 20:03:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 20:03:04,726 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-11-20 20:03:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:04,727 INFO L225 Difference]: With dead ends: 71 [2022-11-20 20:03:04,727 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 20:03:04,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=538, Invalid=6905, Unknown=39, NotChecked=0, Total=7482 [2022-11-20 20:03:04,728 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 437 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:04,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 181 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:03:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 20:03:04,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-11-20 20:03:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 53 states have (on average 1.169811320754717) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-11-20 20:03:04,732 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2022-11-20 20:03:04,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:04,733 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-11-20 20:03:04,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-11-20 20:03:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:03:04,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:04,734 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:04,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:04,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:04,941 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:03:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:04,941 INFO L85 PathProgramCache]: Analyzing trace with hash -137515188, now seen corresponding path program 1 times [2022-11-20 20:03:04,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:04,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672588202] [2022-11-20 20:03:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:04,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 20:03:05,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:05,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672588202] [2022-11-20 20:03:05,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672588202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:03:05,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:03:05,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:03:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444283601] [2022-11-20 20:03:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:03:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:03:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:03:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:03:05,143 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:03:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:05,325 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2022-11-20 20:03:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:03:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2022-11-20 20:03:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:05,327 INFO L225 Difference]: With dead ends: 63 [2022-11-20 20:03:05,327 INFO L226 Difference]: Without dead ends: 63 [2022-11-20 20:03:05,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:03:05,328 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:05,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 76 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:03:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-20 20:03:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-20 20:03:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-11-20 20:03:05,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 44 [2022-11-20 20:03:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:05,331 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-11-20 20:03:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 20:03:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-11-20 20:03:05,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:03:05,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:05,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:05,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 20:03:05,332 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:03:05,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:05,333 INFO L85 PathProgramCache]: Analyzing trace with hash 30007015, now seen corresponding path program 1 times [2022-11-20 20:03:05,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:05,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680780724] [2022-11-20 20:03:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:05,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:03:06,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680780724] [2022-11-20 20:03:06,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680780724] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086698036] [2022-11-20 20:03:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:06,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:06,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:06,328 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:06,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:03:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 20:03:06,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:06,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:03:06,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:06,677 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:03:06,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:03:06,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:06,770 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:03:06,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-20 20:03:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:06,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-20 20:03:07,036 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:03:07,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-20 20:03:07,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:03:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:03:07,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:07,334 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2346 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2346) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-20 20:03:07,493 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2344 Int) (v_ArrVal_2346 (Array Int Int))) (<= (+ (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset| 4) v_ArrVal_2344)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2346)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|)) is different from false [2022-11-20 20:03:07,511 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| Int) (v_ArrVal_2344 Int) (v_ArrVal_2346 (Array Int Int))) (or (<= (+ (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| 4) v_ArrVal_2344))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 |c_ULTIMATE.start_main_~s~0#1.offset|) v_ArrVal_2346)) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) 1) |c_#StackHeapBarrier|) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2022-11-20 20:03:07,523 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| Int) (v_ArrVal_2344 Int) (v_ArrVal_2346 (Array Int Int)) (v_ArrVal_2343 (Array Int Int))) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= (+ 1 (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2343))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_141| 4) v_ArrVal_2344))) (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1) (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2346))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) |c_#StackHeapBarrier|))) is different from false [2022-11-20 20:03:07,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:07,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 49 [2022-11-20 20:03:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2022-11-20 20:03:07,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:07,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2022-11-20 20:03:07,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:07,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-11-20 20:03:07,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-20 20:03:07,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086698036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1719902116] [2022-11-20 20:03:07,778 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-20 20:03:07,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:03:07,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:03:07,778 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:03:07,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:03:07,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:03:07,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:03:07,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:03:07,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:07,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:07,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:07,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:07,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:07,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:07,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:07,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:07,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:07,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:07,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:03:08,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:08,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:08,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 193 [2022-11-20 20:03:08,307 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,310 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,312 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,313 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 193 [2022-11-20 20:03:08,472 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,473 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,476 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,478 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:08,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:08,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:03:08,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 193 [2022-11-20 20:03:08,823 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,825 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,827 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,829 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:08,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:08,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:08,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 193 [2022-11-20 20:03:09,086 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:09,088 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:09,091 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:09,093 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:09,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:09,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:09,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:09,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:09,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:09,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 193 [2022-11-20 20:03:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:09,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-20 20:03:09,423 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:03:09,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:03:09,449 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:03:09,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 20:03:09,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:09,530 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:03:09,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:03:09,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:09,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:09,568 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:03:09,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-20 20:03:09,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:09,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:09,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-20 20:03:09,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:09,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:09,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:10,092 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:03:10,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 162 treesize of output 156 [2022-11-20 20:03:10,130 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-20 20:03:10,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 152 [2022-11-20 20:03:10,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:11,148 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 75 for LOIs [2022-11-20 20:03:11,335 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:22,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9237#(and (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset|) (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) 1) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) |ULTIMATE.start_sll_circular_destroy_~q~0#1.base|) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 1) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (<= (+ |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|)) (not (< |ULTIMATE.start_sll_circular_destroy_~p~0#1.base| |#StackHeapBarrier|)) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= (+ |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (not (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) |ULTIMATE.start_sll_circular_destroy_~q~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:03:22,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:22,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 20:03:22,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 27 [2022-11-20 20:03:22,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472013197] [2022-11-20 20:03:22,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 20:03:22,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:22,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 20:03:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3304, Unknown=28, NotChecked=476, Total=4032 [2022-11-20 20:03:22,376 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:23,336 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-11-20 20:03:23,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:03:23,336 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-20 20:03:23,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:23,337 INFO L225 Difference]: With dead ends: 68 [2022-11-20 20:03:23,337 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 20:03:23,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=321, Invalid=4359, Unknown=28, NotChecked=548, Total=5256 [2022-11-20 20:03:23,338 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 251 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:23,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 143 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:03:23,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 20:03:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2022-11-20 20:03:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 59 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:23,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-11-20 20:03:23,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 45 [2022-11-20 20:03:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:23,342 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-11-20 20:03:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-11-20 20:03:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:03:23,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:23,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:23,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:23,555 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:03:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:23,556 INFO L85 PathProgramCache]: Analyzing trace with hash 684002627, now seen corresponding path program 1 times [2022-11-20 20:03:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:23,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927325326] [2022-11-20 20:03:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 20:03:24,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927325326] [2022-11-20 20:03:24,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927325326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:24,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930847562] [2022-11-20 20:03:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:24,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:24,375 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:24,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:03:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-20 20:03:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:24,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:03:24,678 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:03:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:03:24,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:24,737 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-20 20:03:24,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-11-20 20:03:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:24,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 20:03:24,924 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-20 20:03:24,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2022-11-20 20:03:25,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:25,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2022-11-20 20:03:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 20:03:25,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:03:30,758 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2460 Int) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_153| Int) (v_ArrVal_2456 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_151| Int) (v_ArrVal_2457 Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_153| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2456))) (let ((.cse2 (store (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_153| 4) v_ArrVal_2457))) (let ((.cse0 (store .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse2)) (.cse1 (select .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store .cse0 .cse1 (store (select .cse0 .cse1) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_151| 4) v_ArrVal_2460))))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) 0))))) is different from false [2022-11-20 20:03:30,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:30,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 83 [2022-11-20 20:03:30,815 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:30,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 956 treesize of output 888 [2022-11-20 20:03:30,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:30,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:30,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:30,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 825 treesize of output 783 [2022-11-20 20:03:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:31,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:31,067 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:31,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 85 [2022-11-20 20:03:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2022-11-20 20:03:31,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930847562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:03:31,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954716349] [2022-11-20 20:03:31,861 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-20 20:03:31,861 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:03:31,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:03:31,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:03:31,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:03:31,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-20 20:03:31,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:03:31,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:31,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:03:31,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:31,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:31,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:32,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:03:32,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:32,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:32,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:03:32,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:32,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:32,192 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,194 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,196 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,198 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,199 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 166 [2022-11-20 20:03:32,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:32,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 20:03:32,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:32,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-20 20:03:32,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 20:03:32,387 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,389 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,390 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,393 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,394 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 20:03:32,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:32,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-20 20:03:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:32,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-20 20:03:32,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:32,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 111 [2022-11-20 20:03:32,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:32,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 111 [2022-11-20 20:03:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 20:03:32,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 103 [2022-11-20 20:03:32,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:32,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:32,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-20 20:03:32,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:32,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:32,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-20 20:03:32,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:33,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:33,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:33,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:33,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:33,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 20:03:33,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 20:03:34,215 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-20 20:03:34,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 188 treesize of output 192 [2022-11-20 20:03:34,555 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 54 for LOIs [2022-11-20 20:03:34,701 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:03:46,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9734#(and (<= |ULTIMATE.start_main_~expected~0#1| 2147483647) (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (or (= (select |#valid| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) 1) (= |ULTIMATE.start_sll_circular_get_data_at_~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (<= |ULTIMATE.start_sll_circular_get_data_at_~index#1| 0) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.base|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| (select (select |#memory_int| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|) (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4))) (not (= |ULTIMATE.start_sll_circular_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (< |ULTIMATE.start_sll_circular_destroy_~head#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_sll_circular_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_sll_circular_destroy_~p~0#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (<= (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_circular_get_data_at_~head#1.base|)) (<= (+ |ULTIMATE.start_sll_circular_destroy_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_destroy_~head#1.base|)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_circular_destroy_~head#1.offset| |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_get_data_at_#in~head#1.offset|) (= |ULTIMATE.start_sll_circular_destroy_#in~head#1.base| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) |ULTIMATE.start_sll_circular_destroy_~head#1.offset|) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_destroy_~head#1.base|) 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 (+ |ULTIMATE.start_sll_circular_get_data_at_~head#1.offset| 4)) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-20 20:03:46,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:03:46,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:03:46,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 45 [2022-11-20 20:03:46,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915976321] [2022-11-20 20:03:46,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:03:46,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 20:03:46,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:03:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 20:03:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=4803, Unknown=3, NotChecked=140, Total=5256 [2022-11-20 20:03:46,236 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 45 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:03:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:03:47,232 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-11-20 20:03:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 20:03:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2022-11-20 20:03:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:03:47,233 INFO L225 Difference]: With dead ends: 62 [2022-11-20 20:03:47,233 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:03:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1853 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=399, Invalid=6082, Unknown=3, NotChecked=158, Total=6642 [2022-11-20 20:03:47,235 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:03:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 252 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 628 Invalid, 0 Unknown, 243 Unchecked, 0.5s Time] [2022-11-20 20:03:47,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:03:47,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-11-20 20:03:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 20:03:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-11-20 20:03:47,239 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 47 [2022-11-20 20:03:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:03:47,239 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-11-20 20:03:47,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 39 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 20:03:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-11-20 20:03:47,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-20 20:03:47,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:03:47,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:03:47,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:03:47,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:47,448 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2022-11-20 20:03:47,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:03:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash 585944860, now seen corresponding path program 1 times [2022-11-20 20:03:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:03:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15440820] [2022-11-20 20:03:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:47,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:03:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 20:03:49,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:03:49,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15440820] [2022-11-20 20:03:49,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15440820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:03:49,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423518575] [2022-11-20 20:03:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:03:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:03:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:03:49,344 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:03:49,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94d71852-4cef-464f-93ab-d9520b6ffe49/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 20:03:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:03:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 20:03:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:03:49,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 20:03:49,765 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 20:03:49,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-20 20:03:49,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:49,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 20:03:49,896 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 20:03:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2022-11-20 20:03:49,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-20 20:03:50,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:50,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-20 20:03:50,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:50,134 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:03:50,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-11-20 20:03:50,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 20:03:50,398 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:03:50,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 57 [2022-11-20 20:03:50,416 INFO L321 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2022-11-20 20:03:50,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-11-20 20:03:50,788 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-20 20:03:50,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 39 [2022-11-20 20:03:50,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:03:50,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-11-20 20:03:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:03:51,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:04:44,537 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:05:40,868 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse8 (select .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (.cse10 (select .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| Int)) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162| Int) (v_ArrVal_2579 Int) (v_ArrVal_2578 Int)) (let ((.cse9 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| 4))) (let ((.cse4 (store .cse10 .cse9 v_ArrVal_2579))) (or (forall ((v_ArrVal_2582 Int) (v_ArrVal_2584 Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int)) (or (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset| (select (let ((.cse7 (store .cse8 .cse9 v_ArrVal_2578))) (let ((.cse1 (select .cse7 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (.cse2 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162| 4))) (select (let ((.cse0 (store .cse3 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse4))) (store .cse0 .cse1 (store (select .cse0 .cse1) .cse2 v_ArrVal_2584))) (select (select (let ((.cse5 (store .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse7))) (store .cse5 .cse1 (store (select .cse5 .cse1) .cse2 v_ArrVal_2582))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)))) (not (<= (select .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162|)))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| Int)) (or (forall ((|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162| Int) (v_ArrVal_2579 Int) (v_ArrVal_2578 Int)) (let ((.cse15 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| 4))) (or (forall ((v_ArrVal_2582 Int) (|ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| Int)) (or (not (<= 0 |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)) (not (<= |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset| 0)) (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (let ((.cse11 (let ((.cse14 (store .cse8 .cse15 v_ArrVal_2578))) (let ((.cse12 (store .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse14)) (.cse13 (select .cse14 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) (store .cse12 .cse13 (store (select .cse12 .cse13) (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162| 4) v_ArrVal_2582)))))) (select .cse11 (select (select .cse11 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))) |ULTIMATE.start_sll_circular_destroy_~p~0#1.offset|)))) (not (<= (select (store .cse10 .cse15 v_ArrVal_2579) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_162|))))) (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_164| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) is different from false [2022-11-20 20:05:41,483 INFO L321 Elim1Store]: treesize reduction 1034, result has 38.3 percent of original size [2022-11-20 20:05:41,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 224733 treesize of output 218927 [2022-11-20 20:05:42,765 INFO L321 Elim1Store]: treesize reduction 183, result has 47.1 percent of original size [2022-11-20 20:05:42,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 918636 treesize of output 486926 [2022-11-20 20:06:02,678 WARN L233 SmtUtils]: Spent 19.91s on a formula simplification. DAG size of input: 778 DAG size of output: 778 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 20:06:02,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:02,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 456611 treesize of output 423237 [2022-11-20 20:06:04,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:04,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 423081 treesize of output 423137 [2022-11-20 20:06:06,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:06,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:08,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:08,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:09,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:09,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-20 20:06:09,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:13,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:13,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 675 treesize of output 679 [2022-11-20 20:06:14,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:14,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:16,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:23,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:23,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-20 20:06:23,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:25,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:25,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:25,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-20 20:06:26,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:27,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:34,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:34,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:35,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:35,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 370 [2022-11-20 20:06:36,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:36,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:37,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:38,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:38,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:38,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 334 [2022-11-20 20:06:39,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:39,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:40,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:41,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:41,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:41,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 140 [2022-11-20 20:06:47,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:47,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 41 [2022-11-20 20:06:47,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-20 20:06:48,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-11-20 20:06:49,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2022-11-20 20:06:50,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:50,438 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:50,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-20 20:06:50,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:51,237 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:06:51,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 1 [2022-11-20 20:06:52,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:06:52,793 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:52,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 258 [2022-11-20 20:06:54,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:06:54,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 305 [2022-11-20 20:06:57,743 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-20 20:06:59,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:07:00,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:07:00,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 103 [2022-11-20 20:07:00,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:07:01,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:07:01,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:07:02,059 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 20:07:02,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 1 [2022-11-20 20:07:02,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:07:02,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 146 [2022-11-20 20:07:03,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-20 20:07:03,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:07:03,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 138 [2022-11-20 20:07:07,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 20:07:07,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 423821 treesize of output 423779