./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 09:26:57,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:26:57,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:26:57,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:26:57,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:26:57,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:26:57,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:26:57,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:26:57,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:26:57,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:26:57,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:26:57,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:26:57,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:26:57,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:26:57,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:26:57,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:26:57,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:26:57,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:26:57,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:26:57,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:26:57,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:26:57,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:26:57,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:26:57,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:26:57,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:26:57,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:26:57,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:26:57,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:26:57,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:26:57,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:26:57,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:26:57,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:26:57,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:26:57,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:26:57,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:26:57,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:26:57,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:26:57,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:26:57,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:26:57,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:26:57,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:26:57,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:26:57,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:26:57,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:26:57,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:26:57,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:26:57,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:26:57,300 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:26:57,300 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:26:57,301 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:26:57,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:26:57,301 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:26:57,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:26:57,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:26:57,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:26:57,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:26:57,302 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:26:57,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:26:57,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:26:57,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:26:57,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:26:57,304 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:26:57,304 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_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3d7899c651fa61cfb9cf623e0f4ceb470fe32eb0d0272d2277c965ed07c2f88 [2022-12-14 09:26:57,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:26:57,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:26:57,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:26:57,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:26:57,489 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:26:57,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-12-14 09:27:00,090 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:27:00,319 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:27:00,320 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2022-12-14 09:27:00,329 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/data/51bc2585f/0ad678b8e71a4b2781f1cc633e91ee51/FLAG417408e29 [2022-12-14 09:27:00,344 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/data/51bc2585f/0ad678b8e71a4b2781f1cc633e91ee51 [2022-12-14 09:27:00,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:27:00,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:27:00,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:27:00,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:27:00,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:27:00,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cd86a51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00, skipping insertion in model container [2022-12-14 09:27:00,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:27:00,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:27:00,619 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_ae852608-ea7e-4800-b048-622fbf2d29aa/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-12-14 09:27:00,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:27:00,629 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:27:00,664 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_ae852608-ea7e-4800-b048-622fbf2d29aa/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i[24038,24051] [2022-12-14 09:27:00,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:27:00,684 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:27:00,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00 WrapperNode [2022-12-14 09:27:00,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:27:00,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:27:00,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:27:00,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:27:00,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,719 INFO L138 Inliner]: procedures = 126, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 108 [2022-12-14 09:27:00,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:27:00,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:27:00,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:27:00,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:27:00,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:27:00,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:27:00,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:27:00,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:27:00,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (1/1) ... [2022-12-14 09:27:00,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:27:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:00,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:27:00,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:27:00,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:27:00,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:27:00,894 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:27:00,896 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:27:01,100 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:27:01,141 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:27:01,141 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 09:27:01,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:27:01 BoogieIcfgContainer [2022-12-14 09:27:01,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:27:01,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:27:01,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:27:01,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:27:01,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:27:00" (1/3) ... [2022-12-14 09:27:01,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a64c8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:27:01, skipping insertion in model container [2022-12-14 09:27:01,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:27:00" (2/3) ... [2022-12-14 09:27:01,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a64c8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:27:01, skipping insertion in model container [2022-12-14 09:27:01,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:27:01" (3/3) ... [2022-12-14 09:27:01,152 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2022-12-14 09:27:01,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:27:01,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-12-14 09:27:01,208 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:27:01,212 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;@6e4d2779, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:27:01,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-12-14 09:27:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:27:01,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:27:01,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 4931404, now seen corresponding path program 1 times [2022-12-14 09:27:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:01,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389283066] [2022-12-14 09:27:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:01,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:01,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389283066] [2022-12-14 09:27:01,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389283066] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:01,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:01,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:27:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431504462] [2022-12-14 09:27:01,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:27:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:01,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:27:01,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,491 INFO L87 Difference]: Start difference. First operand has 62 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:01,534 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-12-14 09:27:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:27:01,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:27:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:01,541 INFO L225 Difference]: With dead ends: 74 [2022-12-14 09:27:01,541 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 09:27:01,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,544 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:01,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 09:27:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-12-14 09:27:01,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 29 states have (on average 2.206896551724138) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-12-14 09:27:01,568 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 4 [2022-12-14 09:27:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:01,568 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-12-14 09:27:01,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,569 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-12-14 09:27:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:27:01,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:27:01,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:27:01,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:01,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:01,570 INFO L85 PathProgramCache]: Analyzing trace with hash 4806476, now seen corresponding path program 1 times [2022-12-14 09:27:01,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:01,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399598004] [2022-12-14 09:27:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:01,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:01,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399598004] [2022-12-14 09:27:01,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399598004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:01,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:01,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:27:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258502137] [2022-12-14 09:27:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:01,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:27:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:27:01,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,619 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:01,695 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-12-14 09:27:01,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:27:01,696 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:27:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:01,697 INFO L225 Difference]: With dead ends: 101 [2022-12-14 09:27:01,697 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 09:27:01,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,699 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 53 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 [2022-12-14 09:27:01,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 53 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 09:27:01,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 59. [2022-12-14 09:27:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-12-14 09:27:01,707 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 4 [2022-12-14 09:27:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:01,707 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-12-14 09:27:01,707 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-12-14 09:27:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 09:27:01,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 09:27:01,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:27:01,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:01,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash 4806477, now seen corresponding path program 1 times [2022-12-14 09:27:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:01,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299283053] [2022-12-14 09:27:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:01,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:01,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:01,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:01,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299283053] [2022-12-14 09:27:01,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299283053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:01,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:01,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:27:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440533206] [2022-12-14 09:27:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:27:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:01,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:27:01,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,771 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:01,812 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-12-14 09:27:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:27:01,812 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 09:27:01,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:01,813 INFO L225 Difference]: With dead ends: 57 [2022-12-14 09:27:01,813 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 09:27:01,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:27:01,815 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:01,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:01,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 09:27:01,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 09:27:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-12-14 09:27:01,821 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 4 [2022-12-14 09:27:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-12-14 09:27:01,822 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-12-14 09:27:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:27:01,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:27:01,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 09:27:01,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash 324059268, now seen corresponding path program 1 times [2022-12-14 09:27:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490083248] [2022-12-14 09:27:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:01,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:01,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:01,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490083248] [2022-12-14 09:27:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490083248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:01,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:01,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:27:01,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864308414] [2022-12-14 09:27:01,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:27:01,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:01,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:27:01,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:27:01,883 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:01,973 INFO L93 Difference]: Finished difference Result 101 states and 107 transitions. [2022-12-14 09:27:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:27:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:27:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:01,974 INFO L225 Difference]: With dead ends: 101 [2022-12-14 09:27:01,974 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 09:27:01,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:27:01,975 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:01,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 76 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:01,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 09:27:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 56. [2022-12-14 09:27:01,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-12-14 09:27:01,980 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 6 [2022-12-14 09:27:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:01,981 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-12-14 09:27:01,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-12-14 09:27:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:27:01,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:01,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 09:27:01,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 09:27:01,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:01,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:01,982 INFO L85 PathProgramCache]: Analyzing trace with hash 324059269, now seen corresponding path program 1 times [2022-12-14 09:27:01,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:01,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792425015] [2022-12-14 09:27:01,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:01,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:02,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:02,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792425015] [2022-12-14 09:27:02,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792425015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:02,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:02,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:27:02,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774927630] [2022-12-14 09:27:02,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:02,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:27:02,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:02,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:27:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:27:02,090 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:02,136 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-12-14 09:27:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:27:02,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 09:27:02,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:02,136 INFO L225 Difference]: With dead ends: 58 [2022-12-14 09:27:02,136 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 09:27:02,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:27:02,137 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:02,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 31 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 09:27:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-12-14 09:27:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 2.0) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-12-14 09:27:02,140 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 6 [2022-12-14 09:27:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:02,140 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-12-14 09:27:02,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-12-14 09:27:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:27:02,141 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:02,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:02,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 09:27:02,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1033565312, now seen corresponding path program 1 times [2022-12-14 09:27:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:02,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937252526] [2022-12-14 09:27:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:02,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:02,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937252526] [2022-12-14 09:27:02,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937252526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:02,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:02,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:27:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954385029] [2022-12-14 09:27:02,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:02,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:27:02,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:02,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:27:02,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:27:02,178 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:02,201 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2022-12-14 09:27:02,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:27:02,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:27:02,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:02,202 INFO L225 Difference]: With dead ends: 95 [2022-12-14 09:27:02,202 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 09:27:02,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:27:02,203 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 134 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:02,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 96 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 09:27:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 56. [2022-12-14 09:27:02,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-12-14 09:27:02,206 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 9 [2022-12-14 09:27:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:02,206 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-12-14 09:27:02,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-12-14 09:27:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 09:27:02,206 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:02,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 09:27:02,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1033568195, now seen corresponding path program 1 times [2022-12-14 09:27:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:02,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284656151] [2022-12-14 09:27:02,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:02,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:02,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:02,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284656151] [2022-12-14 09:27:02,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284656151] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841364878] [2022-12-14 09:27:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:02,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:02,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:02,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:02,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:27:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:02,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 09:27:02,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:02,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:02,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841364878] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:02,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286777239] [2022-12-14 09:27:02,404 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:27:02,404 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:02,407 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:02,411 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:02,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:02,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:02,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:02,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:02,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:02,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,651 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 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:02,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:02,732 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 [2022-12-14 09:27:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:02,747 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 [2022-12-14 09:27:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:02,946 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:02,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 09:27:02,991 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:02,992 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 339 treesize of output 346 [2022-12-14 09:27:03,031 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:03,032 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 333 treesize of output 340 [2022-12-14 09:27:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:03,243 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:03,243 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 2 case distinctions, treesize of input 366 treesize of output 367 [2022-12-14 09:27:03,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,287 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:03,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 348 [2022-12-14 09:27:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:03,330 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:03,330 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 2 case distinctions, treesize of input 356 treesize of output 357 [2022-12-14 09:27:03,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:03,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:03,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,846 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:03,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 09:27:03,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,887 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:03,887 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 352 treesize of output 345 [2022-12-14 09:27:03,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:03,922 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:03,923 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 424 treesize of output 417 [2022-12-14 09:27:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:04,078 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:04,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 09:27:04,282 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:04,283 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 339 treesize of output 346 [2022-12-14 09:27:04,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:04,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:04,300 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:04,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 09:27:04,339 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:04,339 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 333 treesize of output 340 [2022-12-14 09:27:04,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:04,563 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:04,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 09:27:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:04,607 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:04,607 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 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 09:27:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:04,646 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:04,646 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 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 09:27:05,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:05,076 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:05,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 09:27:05,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:05,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:05,112 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:05,112 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 352 treesize of output 345 [2022-12-14 09:27:05,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:05,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:05,144 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:05,145 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 424 treesize of output 417 [2022-12-14 09:27:05,261 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 [2022-12-14 09:27:05,266 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 [2022-12-14 09:27:05,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:07,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '976#(and (= |ULTIMATE.start_sll_remove_last_~head#1.base| |ULTIMATE.start_sll_remove_last_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_~head#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 09:27:07,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:07,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:07,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-12-14 09:27:07,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445795990] [2022-12-14 09:27:07,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:07,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:27:07,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:07,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:27:07,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:27:07,374 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:07,395 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2022-12-14 09:27:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:27:07,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 09:27:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:07,396 INFO L225 Difference]: With dead ends: 61 [2022-12-14 09:27:07,396 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 09:27:07,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:27:07,397 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:07,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 144 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 09:27:07,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 09:27:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-12-14 09:27:07,401 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 9 [2022-12-14 09:27:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:07,402 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-12-14 09:27:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-12-14 09:27:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:27:07,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:07,402 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 09:27:07,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:27:07,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:07,604 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:07,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash -582568823, now seen corresponding path program 2 times [2022-12-14 09:27:07,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:07,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699444515] [2022-12-14 09:27:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:07,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:27:07,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699444515] [2022-12-14 09:27:07,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699444515] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481096586] [2022-12-14 09:27:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:27:07,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:07,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:07,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:07,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:27:07,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:27:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:27:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:27:07,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:07,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:07,868 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:27:07,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:27:07,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:07,902 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 14 [2022-12-14 09:27:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:07,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:07,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481096586] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:07,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565630211] [2022-12-14 09:27:07,996 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:27:07,996 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:07,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:07,997 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:07,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:08,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:08,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:08,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:08,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:08,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:08,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:08,169 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 [2022-12-14 09:27:08,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:08,179 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 [2022-12-14 09:27:08,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:08,317 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:08,318 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 346 treesize of output 353 [2022-12-14 09:27:08,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,339 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:08,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 09:27:08,370 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:08,371 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 340 treesize of output 347 [2022-12-14 09:27:08,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:08,626 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:08,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-12-14 09:27:08,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,681 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:08,682 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 2 case distinctions, treesize of input 678 treesize of output 679 [2022-12-14 09:27:08,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:08,725 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:08,725 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 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 09:27:09,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,176 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:09,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 09:27:09,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,207 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:09,207 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 352 treesize of output 345 [2022-12-14 09:27:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,233 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:09,234 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 364 treesize of output 357 [2022-12-14 09:27:09,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,377 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:09,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 09:27:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:09,536 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:09,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 09:27:09,566 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:09,566 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 346 treesize of output 353 [2022-12-14 09:27:09,593 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:09,594 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 340 treesize of output 347 [2022-12-14 09:27:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:09,975 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:09,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1183 treesize of output 1132 [2022-12-14 09:27:10,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:10,038 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:10,039 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 2 case distinctions, treesize of input 1180 treesize of output 1175 [2022-12-14 09:27:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:10,094 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:10,095 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 2 case distinctions, treesize of input 1168 treesize of output 1163 [2022-12-14 09:27:10,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:10,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:10,527 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:10,528 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 348 treesize of output 341 [2022-12-14 09:27:10,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:10,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:10,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:10,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:10,550 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:10,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 403 [2022-12-14 09:27:10,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:10,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:10,575 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:10,576 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 414 treesize of output 407 [2022-12-14 09:27:10,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:10,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:10,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:13,051 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1194#(and (= |ULTIMATE.start_sll_remove_last_~head#1.base| |ULTIMATE.start_sll_remove_last_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_~head#1.base|) 1)) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 09:27:13,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:13,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:13,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-12-14 09:27:13,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817198201] [2022-12-14 09:27:13,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:13,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:27:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:27:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:27:13,053 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:13,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:13,181 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-12-14 09:27:13,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:27:13,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:27:13,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:13,183 INFO L225 Difference]: With dead ends: 99 [2022-12-14 09:27:13,183 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 09:27:13,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:27:13,184 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:13,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 82 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 09:27:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2022-12-14 09:27:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-12-14 09:27:13,186 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 14 [2022-12-14 09:27:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:13,186 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-12-14 09:27:13,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-12-14 09:27:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 09:27:13,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:13,187 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 09:27:13,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 09:27:13,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:13,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:13,389 INFO L85 PathProgramCache]: Analyzing trace with hash -582568822, now seen corresponding path program 1 times [2022-12-14 09:27:13,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:13,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165630142] [2022-12-14 09:27:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:13,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:13,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165630142] [2022-12-14 09:27:13,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165630142] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:13,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740329965] [2022-12-14 09:27:13,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:13,609 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:13,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:27:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:27:13,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:13,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:13,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:13,711 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 14 [2022-12-14 09:27:13,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:13,734 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 14 [2022-12-14 09:27:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:13,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:17,922 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_24| Int)) (or (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_23| Int) (v_ArrVal_281 Int)) (or (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_23| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_282 Int)) (<= (+ |c_ULTIMATE.start_main_~#s~0#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_node_create_~temp~0#1.base_24| v_ArrVal_281) |v_ULTIMATE.start_node_create_~temp~0#1.base_23| v_ArrVal_282) |c_ULTIMATE.start_main_~#s~0#1.base|))))) (not (< |v_ULTIMATE.start_node_create_~temp~0#1.base_24| |c_#StackHeapBarrier|)))) (<= 0 |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from false [2022-12-14 09:27:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 09:27:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740329965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450702029] [2022-12-14 09:27:17,924 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 09:27:17,925 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:17,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:17,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:17,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:17,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:17,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:17,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:17,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:18,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:18,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,067 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 23 treesize of output 13 [2022-12-14 09:27:18,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:18,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,094 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 [2022-12-14 09:27:18,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:18,207 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:18,207 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 346 treesize of output 353 [2022-12-14 09:27:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,225 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:18,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 09:27:18,257 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:18,258 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 340 treesize of output 347 [2022-12-14 09:27:18,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,469 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:18,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-12-14 09:27:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,518 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:18,518 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 2 case distinctions, treesize of input 678 treesize of output 679 [2022-12-14 09:27:18,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,561 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:18,561 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 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 09:27:18,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,858 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:27:18,859 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 386 treesize of output 379 [2022-12-14 09:27:18,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,891 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:27:18,892 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 434 treesize of output 427 [2022-12-14 09:27:18,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:18,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:18,914 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:18,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 528 treesize of output 513 [2022-12-14 09:27:19,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,080 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:19,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 513 treesize of output 509 [2022-12-14 09:27:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,264 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:19,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 09:27:19,291 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:19,292 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 346 treesize of output 353 [2022-12-14 09:27:19,318 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:19,318 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 340 treesize of output 347 [2022-12-14 09:27:19,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:19,540 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:19,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-12-14 09:27:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,596 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:19,597 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 2 case distinctions, treesize of input 678 treesize of output 679 [2022-12-14 09:27:19,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,638 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:19,638 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 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 09:27:19,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:19,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:19,965 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:19,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2022-12-14 09:27:19,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:19,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:19,992 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:19,993 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 348 treesize of output 341 [2022-12-14 09:27:20,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:20,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:20,019 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:20,019 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 414 treesize of output 407 [2022-12-14 09:27:20,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:20,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:20,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:22,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1458#(and (= |ULTIMATE.start_sll_remove_last_~head#1.base| |ULTIMATE.start_sll_remove_last_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (not (<= (+ |ULTIMATE.start_sll_remove_last_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_last_~head#1.base|))) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_remove_last_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 09:27:22,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:22,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:22,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 13 [2022-12-14 09:27:22,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554723160] [2022-12-14 09:27:22,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:22,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:27:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:27:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=354, Unknown=1, NotChecked=40, Total=506 [2022-12-14 09:27:22,212 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:22,295 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-12-14 09:27:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:27:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 09:27:22,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:22,296 INFO L225 Difference]: With dead ends: 55 [2022-12-14 09:27:22,296 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 09:27:22,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=140, Invalid=415, Unknown=1, NotChecked=44, Total=600 [2022-12-14 09:27:22,296 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 214 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:22,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 20 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-12-14 09:27:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 09:27:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-12-14 09:27:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-12-14 09:27:22,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 14 [2022-12-14 09:27:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:22,299 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-12-14 09:27:22,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-12-14 09:27:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:27:22,299 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:22,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 09:27:22,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 09:27:22,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:22,501 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -879764309, now seen corresponding path program 1 times [2022-12-14 09:27:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987589947] [2022-12-14 09:27:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:22,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:22,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 09:27:22,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:22,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987589947] [2022-12-14 09:27:22,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987589947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:22,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:22,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:27:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970501843] [2022-12-14 09:27:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:22,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:27:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:27:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:27:22,631 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:22,808 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-12-14 09:27:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:27:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 09:27:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:22,809 INFO L225 Difference]: With dead ends: 82 [2022-12-14 09:27:22,809 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 09:27:22,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:27:22,810 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 146 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:22,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 134 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 09:27:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2022-12-14 09:27:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2022-12-14 09:27:22,814 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 15 [2022-12-14 09:27:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:22,814 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2022-12-14 09:27:22,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2022-12-14 09:27:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 09:27:22,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:22,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 09:27:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 09:27:22,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash -879764308, now seen corresponding path program 1 times [2022-12-14 09:27:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331985972] [2022-12-14 09:27:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:22,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:22,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331985972] [2022-12-14 09:27:22,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331985972] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:22,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:22,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:27:22,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672500864] [2022-12-14 09:27:22,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:22,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:27:22,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:27:22,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:27:22,995 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:23,181 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-12-14 09:27:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:27:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 09:27:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:23,182 INFO L225 Difference]: With dead ends: 77 [2022-12-14 09:27:23,182 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 09:27:23,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:27:23,183 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 266 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:23,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 100 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 09:27:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2022-12-14 09:27:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-12-14 09:27:23,185 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 15 [2022-12-14 09:27:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:23,186 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-12-14 09:27:23,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-12-14 09:27:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:27:23,186 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:23,186 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:23,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:27:23,187 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:23,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:23,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1168048661, now seen corresponding path program 1 times [2022-12-14 09:27:23,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:23,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337692296] [2022-12-14 09:27:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:23,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:23,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:23,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:23,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337692296] [2022-12-14 09:27:23,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337692296] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:23,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:23,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:27:23,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195510400] [2022-12-14 09:27:23,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:23,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:27:23,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:23,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:27:23,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:27:23,429 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:23,635 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2022-12-14 09:27:23,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:27:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:27:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:23,636 INFO L225 Difference]: With dead ends: 99 [2022-12-14 09:27:23,636 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 09:27:23,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:27:23,637 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 341 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:23,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 90 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 09:27:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2022-12-14 09:27:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.6363636363636365) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-12-14 09:27:23,641 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 18 [2022-12-14 09:27:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:23,641 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-12-14 09:27:23,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-12-14 09:27:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:27:23,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:23,642 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:27:23,642 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1168048662, now seen corresponding path program 1 times [2022-12-14 09:27:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:23,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978914839] [2022-12-14 09:27:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:23,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978914839] [2022-12-14 09:27:23,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978914839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:23,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:23,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:27:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906493227] [2022-12-14 09:27:23,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:23,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:27:23,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:23,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:27:23,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:27:23,692 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:23,759 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-12-14 09:27:23,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:27:23,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:27:23,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:23,760 INFO L225 Difference]: With dead ends: 63 [2022-12-14 09:27:23,760 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 09:27:23,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:27:23,761 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:23,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 55 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 09:27:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-12-14 09:27:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2022-12-14 09:27:23,762 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 18 [2022-12-14 09:27:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:23,763 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2022-12-14 09:27:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2022-12-14 09:27:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 09:27:23,763 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:23,763 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:23,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 09:27:23,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1168064368, now seen corresponding path program 1 times [2022-12-14 09:27:23,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958530990] [2022-12-14 09:27:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:23,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:23,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958530990] [2022-12-14 09:27:23,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958530990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:23,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:23,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:27:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090986787] [2022-12-14 09:27:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:23,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:27:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:27:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:27:23,854 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:23,943 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-12-14 09:27:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:27:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 09:27:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:23,943 INFO L225 Difference]: With dead ends: 61 [2022-12-14 09:27:23,944 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 09:27:23,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:27:23,944 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 207 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:23,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 52 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:27:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 09:27:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 09:27:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 60 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2022-12-14 09:27:23,946 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 18 [2022-12-14 09:27:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:23,946 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2022-12-14 09:27:23,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2022-12-14 09:27:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:27:23,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:23,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:27:23,947 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1850256948, now seen corresponding path program 1 times [2022-12-14 09:27:23,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:23,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700541120] [2022-12-14 09:27:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:24,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:24,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700541120] [2022-12-14 09:27:24,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700541120] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:24,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:24,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:27:24,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715192243] [2022-12-14 09:27:24,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:24,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:27:24,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:24,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:27:24,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:27:24,087 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:24,225 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-12-14 09:27:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:27:24,225 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 09:27:24,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:24,225 INFO L225 Difference]: With dead ends: 77 [2022-12-14 09:27:24,225 INFO L226 Difference]: Without dead ends: 77 [2022-12-14 09:27:24,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:27:24,226 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 243 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:24,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 84 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:24,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-12-14 09:27:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2022-12-14 09:27:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.5) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-12-14 09:27:24,227 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 19 [2022-12-14 09:27:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:24,228 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-12-14 09:27:24,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,228 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-12-14 09:27:24,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:27:24,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:24,228 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:24,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 09:27:24,228 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:24,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1508298220, now seen corresponding path program 1 times [2022-12-14 09:27:24,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:24,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835841520] [2022-12-14 09:27:24,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:24,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:24,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835841520] [2022-12-14 09:27:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835841520] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:24,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:24,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-14 09:27:24,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916874882] [2022-12-14 09:27:24,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:24,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:27:24,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:24,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:27:24,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:27:24,539 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:24,828 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-12-14 09:27:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:27:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 09:27:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:24,828 INFO L225 Difference]: With dead ends: 75 [2022-12-14 09:27:24,828 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 09:27:24,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:27:24,829 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 404 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:24,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 202 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:24,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 09:27:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2022-12-14 09:27:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 61 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-12-14 09:27:24,830 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 20 [2022-12-14 09:27:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:24,830 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-12-14 09:27:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-12-14 09:27:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 09:27:24,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:24,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-14 09:27:24,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1523390446, now seen corresponding path program 1 times [2022-12-14 09:27:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125345793] [2022-12-14 09:27:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:24,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:24,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125345793] [2022-12-14 09:27:24,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125345793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:24,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:27:24,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:27:24,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881332750] [2022-12-14 09:27:24,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:24,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:27:24,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:24,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:27:24,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:27:24,882 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:24,945 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-12-14 09:27:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:27:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 09:27:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:24,946 INFO L225 Difference]: With dead ends: 61 [2022-12-14 09:27:24,946 INFO L226 Difference]: Without dead ends: 61 [2022-12-14 09:27:24,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:27:24,947 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:24,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 66 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-14 09:27:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-12-14 09:27:24,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.434782608695652) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-12-14 09:27:24,949 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 20 [2022-12-14 09:27:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:24,949 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-12-14 09:27:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-12-14 09:27:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:27:24,949 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:24,949 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:24,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 09:27:24,950 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 487398523, now seen corresponding path program 1 times [2022-12-14 09:27:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:24,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288096558] [2022-12-14 09:27:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:25,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288096558] [2022-12-14 09:27:25,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288096558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598868723] [2022-12-14 09:27:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:25,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:25,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:25,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:25,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:27:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:25,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 62 conjunts are in the unsatisfiable core [2022-12-14 09:27:25,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:25,622 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:27:25,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:27:25,626 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 14 treesize of output 16 [2022-12-14 09:27:25,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:25,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:25,918 INFO L321 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2022-12-14 09:27:25,918 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 71 [2022-12-14 09:27:25,922 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-14 09:27:25,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 32 [2022-12-14 09:27:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:26,137 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 130 treesize of output 122 [2022-12-14 09:27:26,225 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-12-14 09:27:26,226 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 260 treesize of output 287 [2022-12-14 09:27:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:26,389 INFO L321 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2022-12-14 09:27:26,389 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 284 treesize of output 259 [2022-12-14 09:27:26,478 INFO L321 Elim1Store]: treesize reduction 37, result has 66.7 percent of original size [2022-12-14 09:27:26,478 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 560 treesize of output 535 [2022-12-14 09:27:31,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:31,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598868723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498274642] [2022-12-14 09:27:31,216 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:27:31,217 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:31,217 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:31,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:31,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:31,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:31,286 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 [2022-12-14 09:27:31,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:31,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:31,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:31,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:31,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:31,359 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 [2022-12-14 09:27:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:31,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:31,385 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 [2022-12-14 09:27:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,500 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:31,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 09:27:31,531 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:31,532 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 339 treesize of output 346 [2022-12-14 09:27:31,561 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:31,562 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 333 treesize of output 340 [2022-12-14 09:27:31,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,874 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:31,874 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 2 case distinctions, treesize of input 853 treesize of output 854 [2022-12-14 09:27:31,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:31,915 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:31,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 834 treesize of output 803 [2022-12-14 09:27:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:31,969 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:31,969 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 2 case distinctions, treesize of input 835 treesize of output 830 [2022-12-14 09:27:32,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:32,565 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:32,565 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 348 treesize of output 341 [2022-12-14 09:27:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:32,590 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:32,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 418 treesize of output 403 [2022-12-14 09:27:32,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:32,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:32,618 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:32,619 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 414 treesize of output 407 [2022-12-14 09:27:32,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,772 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:32,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2022-12-14 09:27:32,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:32,932 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:32,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 09:27:32,970 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:32,971 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 339 treesize of output 346 [2022-12-14 09:27:33,008 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:33,008 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 333 treesize of output 340 [2022-12-14 09:27:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:33,346 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:33,346 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 2 case distinctions, treesize of input 853 treesize of output 848 [2022-12-14 09:27:33,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,400 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:33,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 828 treesize of output 797 [2022-12-14 09:27:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:33,460 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:33,460 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 2 case distinctions, treesize of input 829 treesize of output 830 [2022-12-14 09:27:33,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,930 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:27:33,930 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 369 treesize of output 362 [2022-12-14 09:27:33,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:33,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:33,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,958 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:33,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 409 treesize of output 394 [2022-12-14 09:27:33,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:33,983 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:27:33,983 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 405 treesize of output 398 [2022-12-14 09:27:34,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:34,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:34,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:38,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2959#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (or (not (<= (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_remove_last_~last~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 4)))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:27:38,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:38,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:38,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2022-12-14 09:27:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064016739] [2022-12-14 09:27:38,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:38,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:27:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:27:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1405, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 09:27:38,007 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:40,021 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2022-12-14 09:27:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 09:27:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:27:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:40,022 INFO L225 Difference]: With dead ends: 141 [2022-12-14 09:27:40,022 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 09:27:40,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=660, Invalid=3500, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 09:27:40,024 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 978 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:40,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 239 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:27:40,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 09:27:40,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2022-12-14 09:27:40,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.46) internal successors, (73), 63 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2022-12-14 09:27:40,026 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 21 [2022-12-14 09:27:40,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:40,026 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2022-12-14 09:27:40,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:40,026 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2022-12-14 09:27:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:27:40,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:40,026 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:40,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:27:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:40,228 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash 487398522, now seen corresponding path program 1 times [2022-12-14 09:27:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:40,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222442775] [2022-12-14 09:27:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:40,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222442775] [2022-12-14 09:27:40,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222442775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:40,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390048637] [2022-12-14 09:27:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:40,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:40,586 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:40,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:27:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 09:27:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:40,737 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:27:40,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:27:40,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:40,874 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 49 treesize of output 37 [2022-12-14 09:27:40,921 INFO L321 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-12-14 09:27:40,921 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 27 [2022-12-14 09:27:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:40,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:40,988 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 20 [2022-12-14 09:27:41,035 INFO L321 Elim1Store]: treesize reduction 13, result has 62.9 percent of original size [2022-12-14 09:27:41,036 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 155 treesize of output 152 [2022-12-14 09:27:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:27:41,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390048637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:41,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894419781] [2022-12-14 09:27:41,101 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:27:41,101 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:41,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:41,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:41,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:41,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:41,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:41,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:41,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:41,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:41,269 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 [2022-12-14 09:27:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:41,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:41,296 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 [2022-12-14 09:27:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:41,445 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:41,445 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 339 treesize of output 346 [2022-12-14 09:27:41,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,497 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:27:41,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2022-12-14 09:27:41,538 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:41,538 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 329 treesize of output 336 [2022-12-14 09:27:41,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:41,918 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:41,918 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 2 case distinctions, treesize of input 693 treesize of output 688 [2022-12-14 09:27:41,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:41,987 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:27:41,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 668 treesize of output 657 [2022-12-14 09:27:42,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,044 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:42,045 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 2 case distinctions, treesize of input 677 treesize of output 672 [2022-12-14 09:27:42,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:42,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:42,431 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:42,431 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 356 treesize of output 349 [2022-12-14 09:27:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:42,458 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:42,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 438 treesize of output 423 [2022-12-14 09:27:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:42,492 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:27:42,493 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 434 treesize of output 427 [2022-12-14 09:27:42,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,677 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:42,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 435 treesize of output 439 [2022-12-14 09:27:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:42,847 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:27:42,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2022-12-14 09:27:42,882 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:42,883 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 335 treesize of output 342 [2022-12-14 09:27:42,917 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:42,918 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 329 treesize of output 336 [2022-12-14 09:27:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,235 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:27:43,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 669 treesize of output 654 [2022-12-14 09:27:43,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,283 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:43,283 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 2 case distinctions, treesize of input 674 treesize of output 675 [2022-12-14 09:27:43,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,327 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:43,328 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 2 case distinctions, treesize of input 668 treesize of output 669 [2022-12-14 09:27:43,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:43,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,685 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:43,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 380 treesize of output 365 [2022-12-14 09:27:43,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,718 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:27:43,718 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 376 treesize of output 369 [2022-12-14 09:27:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:43,747 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:27:43,747 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 424 treesize of output 417 [2022-12-14 09:27:44,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:44,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:44,029 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:47,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3372#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_~last~0#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:27:47,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:47,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:47,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 24 [2022-12-14 09:27:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862048079] [2022-12-14 09:27:47,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:47,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:27:47,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:27:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:27:47,763 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:48,493 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-12-14 09:27:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 09:27:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:27:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:48,494 INFO L225 Difference]: With dead ends: 82 [2022-12-14 09:27:48,494 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 09:27:48,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:27:48,495 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 395 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:48,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 172 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:27:48,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 09:27:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 64. [2022-12-14 09:27:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.44) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-12-14 09:27:48,496 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 21 [2022-12-14 09:27:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:48,496 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-12-14 09:27:48,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-12-14 09:27:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:27:48,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:48,497 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:48,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 09:27:48,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:48,699 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash 19536527, now seen corresponding path program 1 times [2022-12-14 09:27:48,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:48,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941917854] [2022-12-14 09:27:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:48,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:48,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941917854] [2022-12-14 09:27:48,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941917854] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779421523] [2022-12-14 09:27:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:48,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:48,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:48,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:48,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:27:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:48,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 09:27:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,027 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 14 [2022-12-14 09:27:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:49,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:27:49,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779421523] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:27:49,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:27:49,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-12-14 09:27:49,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807864842] [2022-12-14 09:27:49,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:27:49,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:27:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:27:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:27:49,030 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:49,106 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-12-14 09:27:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:27:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:27:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:49,107 INFO L225 Difference]: With dead ends: 70 [2022-12-14 09:27:49,107 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 09:27:49,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:27:49,107 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 130 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:49,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 09:27:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-12-14 09:27:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.42) internal successors, (71), 62 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2022-12-14 09:27:49,109 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 21 [2022-12-14 09:27:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:49,109 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2022-12-14 09:27:49,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:49,109 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2022-12-14 09:27:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:27:49,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:49,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:49,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:27:49,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:49,310 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:49,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:49,311 INFO L85 PathProgramCache]: Analyzing trace with hash 238546084, now seen corresponding path program 1 times [2022-12-14 09:27:49,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:49,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316672406] [2022-12-14 09:27:49,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:49,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:49,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:49,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:49,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316672406] [2022-12-14 09:27:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316672406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:49,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584526841] [2022-12-14 09:27:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:49,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:49,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:49,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:27:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 09:27:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:49,464 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 7 treesize of output 3 [2022-12-14 09:27:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:49,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:49,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584526841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:49,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009182807] [2022-12-14 09:27:49,476 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 09:27:49,476 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:49,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:49,476 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:49,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:49,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:49,538 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 13 treesize of output 9 [2022-12-14 09:27:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:49,552 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 13 treesize of output 9 [2022-12-14 09:27:49,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,570 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 25 treesize of output 13 [2022-12-14 09:27:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:49,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:49,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:49,622 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 [2022-12-14 09:27:49,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:49,631 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 [2022-12-14 09:27:49,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:49,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:49,715 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:49,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2022-12-14 09:27:49,751 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:49,752 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 339 treesize of output 346 [2022-12-14 09:27:49,792 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:49,793 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 333 treesize of output 340 [2022-12-14 09:27:50,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,199 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:50,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1155 treesize of output 1104 [2022-12-14 09:27:50,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,259 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:50,259 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 2 case distinctions, treesize of input 1152 treesize of output 1147 [2022-12-14 09:27:50,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,315 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:50,315 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 2 case distinctions, treesize of input 1140 treesize of output 1135 [2022-12-14 09:27:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,748 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:27:50,748 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 368 treesize of output 361 [2022-12-14 09:27:50,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,769 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:50,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 444 treesize of output 429 [2022-12-14 09:27:50,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:50,794 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 09:27:50,795 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 440 treesize of output 433 [2022-12-14 09:27:50,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:50,949 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:50,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 465 treesize of output 469 [2022-12-14 09:27:51,122 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:51,123 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 339 treesize of output 346 [2022-12-14 09:27:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,140 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:27:51,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 09:27:51,170 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:51,171 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 333 treesize of output 340 [2022-12-14 09:27:51,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,304 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:27:51,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 354 [2022-12-14 09:27:51,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,344 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:51,344 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 2 case distinctions, treesize of input 362 treesize of output 363 [2022-12-14 09:27:51,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,379 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:51,379 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 2 case distinctions, treesize of input 356 treesize of output 357 [2022-12-14 09:27:51,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,601 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:27:51,601 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 386 treesize of output 379 [2022-12-14 09:27:51,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,639 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:27:51,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 434 treesize of output 427 [2022-12-14 09:27:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:51,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:51,673 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:51,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 528 treesize of output 513 [2022-12-14 09:27:52,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:52,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:52,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:27:55,462 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3912#(and (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|) 1)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 4)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:27:55,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:27:55,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:27:55,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-12-14 09:27:55,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5924526] [2022-12-14 09:27:55,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:27:55,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:27:55,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:27:55,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:27:55,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-14 09:27:55,464 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:27:55,570 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-12-14 09:27:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:27:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:27:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:27:55,570 INFO L225 Difference]: With dead ends: 67 [2022-12-14 09:27:55,570 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 09:27:55,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:27:55,572 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:27:55,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 57 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:27:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 09:27:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-12-14 09:27:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-12-14 09:27:55,574 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 23 [2022-12-14 09:27:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:27:55,574 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-12-14 09:27:55,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:27:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-12-14 09:27:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:27:55,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:27:55,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:27:55,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:27:55,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:55,776 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:27:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:27:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 238546085, now seen corresponding path program 1 times [2022-12-14 09:27:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:27:55,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847502585] [2022-12-14 09:27:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:55,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:27:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:55,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 09:27:55,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:27:55,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847502585] [2022-12-14 09:27:55,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847502585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:27:55,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28937070] [2022-12-14 09:27:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:27:55,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:27:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:27:55,980 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:27:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:27:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:27:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:27:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:27:56,081 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 7 treesize of output 3 [2022-12-14 09:27:56,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:56,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:27:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:27:56,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28937070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:27:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292260714] [2022-12-14 09:27:56,129 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 09:27:56,129 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:27:56,129 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:27:56,129 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:27:56,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:27:56,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:27:56,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:27:56,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:56,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:27:56,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:27:56,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:27:56,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:27:56,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:27:56,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:56,281 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 [2022-12-14 09:27:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:56,295 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 [2022-12-14 09:27:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:27:56,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,450 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:27:56,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2022-12-14 09:27:56,484 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:56,485 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 342 treesize of output 349 [2022-12-14 09:27:56,515 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:56,516 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 343 [2022-12-14 09:27:56,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:56,907 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:27:56,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 871 treesize of output 844 [2022-12-14 09:27:56,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,956 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:56,957 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 2 case distinctions, treesize of input 872 treesize of output 873 [2022-12-14 09:27:56,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:56,997 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:56,997 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 2 case distinctions, treesize of input 866 treesize of output 861 [2022-12-14 09:27:57,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:57,452 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:57,452 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 352 treesize of output 345 [2022-12-14 09:27:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:57,477 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:27:57,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 368 treesize of output 353 [2022-12-14 09:27:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:57,501 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:57,501 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 364 treesize of output 357 [2022-12-14 09:27:57,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,652 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:27:57,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 09:27:57,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:57,814 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:27:57,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2022-12-14 09:27:57,846 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:57,846 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 342 treesize of output 349 [2022-12-14 09:27:57,877 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:27:57,877 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 336 treesize of output 343 [2022-12-14 09:27:58,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,294 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:27:58,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 683 treesize of output 668 [2022-12-14 09:27:58,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:58,341 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:58,342 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 2 case distinctions, treesize of input 688 treesize of output 689 [2022-12-14 09:27:58,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:58,379 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:27:58,379 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 2 case distinctions, treesize of input 682 treesize of output 683 [2022-12-14 09:27:58,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,895 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:58,895 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 352 treesize of output 345 [2022-12-14 09:27:58,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,922 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:27:58,923 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 364 treesize of output 357 [2022-12-14 09:27:58,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:58,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:58,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:27:58,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:27:58,941 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:27:58,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 425 [2022-12-14 09:27:59,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:27:59,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:27:59,236 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:28:02,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4211#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 4)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (< (select |#length| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 8)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:28:02,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:28:02,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:28:02,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 10 [2022-12-14 09:28:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690143102] [2022-12-14 09:28:02,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:28:02,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:28:02,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:28:02,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:28:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:28:02,355 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:28:02,837 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2022-12-14 09:28:02,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:28:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:28:02,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:28:02,838 INFO L225 Difference]: With dead ends: 95 [2022-12-14 09:28:02,838 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 09:28:02,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:28:02,839 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 317 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:28:02,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 127 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:28:02,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 09:28:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 65. [2022-12-14 09:28:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:02,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-12-14 09:28:02,840 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 23 [2022-12-14 09:28:02,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:28:02,841 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-12-14 09:28:02,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:28:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-12-14 09:28:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:28:02,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:28:02,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:28:02,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 09:28:03,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:03,043 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:28:03,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:28:03,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1195002901, now seen corresponding path program 2 times [2022-12-14 09:28:03,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:28:03,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525309489] [2022-12-14 09:28:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:28:03,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:28:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:28:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:03,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:28:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525309489] [2022-12-14 09:28:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525309489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:28:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045275965] [2022-12-14 09:28:03,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:28:03,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:28:03,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:28:03,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:28:03,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:28:03,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:28:03,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:28:03,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-14 09:28:03,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:28:04,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:28:04,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:28:04,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:28:04,106 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:28:04,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:28:04,147 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 [2022-12-14 09:28:04,151 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 [2022-12-14 09:28:04,160 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 [2022-12-14 09:28:04,165 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 [2022-12-14 09:28:04,203 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 22 [2022-12-14 09:28:04,208 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 29 treesize of output 28 [2022-12-14 09:28:04,540 INFO L321 Elim1Store]: treesize reduction 62, result has 33.3 percent of original size [2022-12-14 09:28:04,540 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 97 [2022-12-14 09:28:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:28:04,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:28:05,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,532 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 93 [2022-12-14 09:28:05,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,538 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2022-12-14 09:28:05,553 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,553 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-12-14 09:28:05,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,559 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 78 [2022-12-14 09:28:05,573 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_4)) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_3))) (let ((.cse2 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (= (select (select .cse0 (select (select .cse1 .cse2) .cse3)) (+ (select (select .cse0 .cse2) .cse3) 4)) 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse2)) (not (= (select v_arrayElimArr_4 .cse3) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_3 .cse3))))))) (forall ((v_arrayElimArr_2 (Array Int Int)) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_2)) (.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_1))) (let ((.cse5 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (+ (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (= (select (select .cse4 (select (select .cse4 .cse5) .cse6)) (+ (select (select .cse7 .cse5) .cse6) 4)) 0) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse5)) (not (= (select v_arrayElimArr_1 .cse6) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= (select v_arrayElimArr_2 .cse6) |c_ULTIMATE.start_sll_create_~head~0#1.offset|))))))) is different from false [2022-12-14 09:28:05,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,806 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 150 treesize of output 120 [2022-12-14 09:28:05,813 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:05,813 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 149 treesize of output 99 [2022-12-14 09:28:05,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:28:05,900 INFO L321 Elim1Store]: treesize reduction 93, result has 58.1 percent of original size [2022-12-14 09:28:05,900 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 324 treesize of output 372 [2022-12-14 09:28:06,196 INFO L321 Elim1Store]: treesize reduction 58, result has 82.4 percent of original size [2022-12-14 09:28:06,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 890 treesize of output 914 [2022-12-14 09:28:06,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:06,262 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 778 treesize of output 710 [2022-12-14 09:28:06,359 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:28:06,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 711 treesize of output 691 [2022-12-14 09:29:00,277 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:29:00,277 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 150 treesize of output 110 [2022-12-14 09:29:00,283 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:29:00,283 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 139 treesize of output 99 [2022-12-14 09:29:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:29:00,304 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:29:00,304 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 206 treesize of output 220 [2022-12-14 09:29:01,634 INFO L321 Elim1Store]: treesize reduction 331, result has 76.4 percent of original size [2022-12-14 09:29:01,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 671 treesize of output 1473 [2022-12-14 09:29:01,852 INFO L321 Elim1Store]: treesize reduction 12, result has 91.2 percent of original size [2022-12-14 09:29:01,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1034 treesize of output 902 [2022-12-14 09:29:01,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:29:01,938 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 978 treesize of output 648 [2022-12-14 09:35:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-14 09:35:46,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045275965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:35:46,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [700674774] [2022-12-14 09:35:46,150 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 09:35:46,150 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:35:46,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:35:46,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:35:46,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:35:46,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:35:46,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:35:46,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:35:46,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:35:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:35:46,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:35:46,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:35:46,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,280 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 25 treesize of output 13 [2022-12-14 09:35:46,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:46,300 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 [2022-12-14 09:35:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:35:46,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:46,327 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 [2022-12-14 09:35:46,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:35:46,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,433 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:35:46,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 09:35:46,473 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:46,474 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 346 treesize of output 353 [2022-12-14 09:35:46,513 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:46,513 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 340 treesize of output 347 [2022-12-14 09:35:46,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,757 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:46,758 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 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 09:35:46,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:46,809 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:46,809 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 2 case distinctions, treesize of input 680 treesize of output 681 [2022-12-14 09:35:46,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:46,861 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:35:46,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-12-14 09:35:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,236 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:35:47,236 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 372 treesize of output 365 [2022-12-14 09:35:47,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,265 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:35:47,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 454 treesize of output 439 [2022-12-14 09:35:47,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,296 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 09:35:47,297 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 450 treesize of output 443 [2022-12-14 09:35:47,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,466 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:35:47,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 481 treesize of output 477 [2022-12-14 09:35:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,632 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:35:47,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 09:35:47,670 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:47,670 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 346 treesize of output 353 [2022-12-14 09:35:47,708 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:47,709 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 340 treesize of output 347 [2022-12-14 09:35:47,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:47,939 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:35:47,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 673 treesize of output 654 [2022-12-14 09:35:47,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:47,994 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:47,994 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 2 case distinctions, treesize of input 678 treesize of output 679 [2022-12-14 09:35:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:48,045 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:48,045 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 2 case distinctions, treesize of input 672 treesize of output 673 [2022-12-14 09:35:48,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:48,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:48,362 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:35:48,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 09:35:48,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:48,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:48,388 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:35:48,389 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 352 treesize of output 345 [2022-12-14 09:35:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:48,412 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:35:48,412 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 424 treesize of output 417 [2022-12-14 09:35:48,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:35:48,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:35:48,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:35:53,055 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4592#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (or (not (<= (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_remove_last_~last~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 4)))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:35:53,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:35:53,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:35:53,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 38 [2022-12-14 09:35:53,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937945948] [2022-12-14 09:35:53,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:35:53,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 09:35:53,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:35:53,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 09:35:53,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2392, Unknown=1, NotChecked=98, Total=2652 [2022-12-14 09:35:53,058 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:35:57,014 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-12-14 09:35:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:35:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 09:35:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:35:57,015 INFO L225 Difference]: With dead ends: 134 [2022-12-14 09:35:57,015 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 09:35:57,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=298, Invalid=3487, Unknown=1, NotChecked=120, Total=3906 [2022-12-14 09:35:57,017 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 182 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:35:57,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 575 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 888 Invalid, 0 Unknown, 83 Unchecked, 0.8s Time] [2022-12-14 09:35:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 09:35:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2022-12-14 09:35:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.328358208955224) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-12-14 09:35:57,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 24 [2022-12-14 09:35:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:35:57,020 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-12-14 09:35:57,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 38 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,021 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-12-14 09:35:57,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:35:57,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:35:57,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:35:57,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:35:57,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 09:35:57,222 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:35:57,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:35:57,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2102780747, now seen corresponding path program 1 times [2022-12-14 09:35:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:35:57,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263105076] [2022-12-14 09:35:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:35:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:35:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:35:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:35:57,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:35:57,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263105076] [2022-12-14 09:35:57,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263105076] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:35:57,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:35:57,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:35:57,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651813124] [2022-12-14 09:35:57,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:35:57,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:35:57,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:35:57,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:35:57,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:35:57,266 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:35:57,307 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2022-12-14 09:35:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:35:57,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 09:35:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:35:57,308 INFO L225 Difference]: With dead ends: 84 [2022-12-14 09:35:57,308 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 09:35:57,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:35:57,308 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:35:57,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 20 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:35:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 09:35:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 09:35:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 71 states have (on average 1.323943661971831) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-12-14 09:35:57,311 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 24 [2022-12-14 09:35:57,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:35:57,311 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-12-14 09:35:57,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:35:57,311 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-12-14 09:35:57,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 09:35:57,312 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:35:57,312 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:35:57,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 09:35:57,312 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:35:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:35:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1609522180, now seen corresponding path program 1 times [2022-12-14 09:35:57,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:35:57,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848107057] [2022-12-14 09:35:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:35:57,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:35:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:35:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:35:57,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:35:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848107057] [2022-12-14 09:35:57,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848107057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:35:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984700787] [2022-12-14 09:35:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:35:57,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:35:57,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:35:57,627 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:35:57,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:35:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:35:57,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 09:35:57,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:35:57,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:35:57,827 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 13 treesize of output 9 [2022-12-14 09:35:57,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 09:35:58,021 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 09:35:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:58,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:35:58,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 15 [2022-12-14 09:35:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:35:58,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:35:58,310 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 [2022-12-14 09:35:58,398 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:35:58,398 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 170 treesize of output 176 [2022-12-14 09:35:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:35:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984700787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:35:58,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1444173161] [2022-12-14 09:35:58,910 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 09:35:58,910 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:35:58,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:35:58,910 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:35:58,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:35:58,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:35:58,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:35:58,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:35:58,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:35:58,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:35:58,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:58,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:35:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:35:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:35:59,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,036 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 [2022-12-14 09:35:59,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:35:59,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,063 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 [2022-12-14 09:35:59,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:35:59,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,161 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:35:59,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2022-12-14 09:35:59,192 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:59,192 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 346 treesize of output 353 [2022-12-14 09:35:59,227 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:35:59,227 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 340 treesize of output 347 [2022-12-14 09:35:59,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,450 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:59,450 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 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 09:35:59,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,492 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:35:59,492 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 2 case distinctions, treesize of input 680 treesize of output 681 [2022-12-14 09:35:59,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,530 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:35:59,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-12-14 09:35:59,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:35:59,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,900 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:35:59,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2022-12-14 09:35:59,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,928 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:35:59,929 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 352 treesize of output 345 [2022-12-14 09:35:59,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:35:59,955 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:35:59,955 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 424 treesize of output 417 [2022-12-14 09:36:00,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:00,105 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:36:00,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2022-12-14 09:36:00,266 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:00,267 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 346 treesize of output 353 [2022-12-14 09:36:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:00,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:00,287 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:36:00,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 346 treesize of output 328 [2022-12-14 09:36:00,320 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:00,321 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 340 treesize of output 347 [2022-12-14 09:36:00,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:00,534 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:00,534 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 2 case distinctions, treesize of input 686 treesize of output 687 [2022-12-14 09:36:00,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:00,591 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:00,591 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 2 case distinctions, treesize of input 680 treesize of output 681 [2022-12-14 09:36:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:00,648 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:36:00,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 661 treesize of output 642 [2022-12-14 09:36:01,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:01,103 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:01,104 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 377 treesize of output 370 [2022-12-14 09:36:01,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:01,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:01,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:01,132 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:36:01,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 465 treesize of output 450 [2022-12-14 09:36:01,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:01,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:01,164 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 09:36:01,165 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 461 treesize of output 454 [2022-12-14 09:36:01,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:01,581 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 [2022-12-14 09:36:01,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:01,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:36:01,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:36:01,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:36:06,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5189#(and (<= 1 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_sll_remove_last_~last~0#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (not (< |ULTIMATE.start_sll_remove_last_~last~0#1.base| |#StackHeapBarrier|)) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 8) (select |#length| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) (<= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|) (+ |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.offset| 4)) 0) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_last_~snd_to_last~0#1.base|) 1) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:36:06,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:36:06,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:36:06,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 29 [2022-12-14 09:36:06,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358796663] [2022-12-14 09:36:06,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:36:06,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 09:36:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:36:06,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 09:36:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 09:36:06,104 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:36:07,374 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2022-12-14 09:36:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:36:07,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 09:36:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:36:07,375 INFO L225 Difference]: With dead ends: 130 [2022-12-14 09:36:07,375 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 09:36:07,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=427, Invalid=2653, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 09:36:07,377 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1012 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:36:07,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 259 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:36:07,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 09:36:07,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2022-12-14 09:36:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2022-12-14 09:36:07,380 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 25 [2022-12-14 09:36:07,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:36:07,380 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2022-12-14 09:36:07,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:07,380 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2022-12-14 09:36:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 09:36:07,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:36:07,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:36:07,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 09:36:07,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 09:36:07,581 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:36:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:36:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -761783070, now seen corresponding path program 1 times [2022-12-14 09:36:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:36:07,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016304007] [2022-12-14 09:36:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:36:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:07,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:36:07,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:36:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016304007] [2022-12-14 09:36:07,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016304007] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:36:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855449184] [2022-12-14 09:36:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:07,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:36:07,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:36:07,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:36:07,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:36:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:07,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:36:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:36:08,096 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 [2022-12-14 09:36:08,210 INFO L321 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-12-14 09:36:08,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 44 [2022-12-14 09:36:08,253 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 [2022-12-14 09:36:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:36:08,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:36:08,321 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 27 treesize of output 19 [2022-12-14 09:36:08,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:08,396 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 129 treesize of output 139 [2022-12-14 09:36:08,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:36:08,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855449184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:36:08,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084284569] [2022-12-14 09:36:08,655 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 09:36:08,655 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:36:08,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:36:08,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:36:08,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:36:08,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:36:08,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:36:08,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:36:08,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:08,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:08,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:36:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:08,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:36:08,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:08,804 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 [2022-12-14 09:36:08,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:08,815 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 [2022-12-14 09:36:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:36:08,927 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:08,928 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 339 treesize of output 346 [2022-12-14 09:36:08,968 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:08,969 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 333 treesize of output 340 [2022-12-14 09:36:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:08,989 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:36:08,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 315 [2022-12-14 09:36:09,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,264 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:36:09,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 09:36:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:09,329 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:09,329 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 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 09:36:09,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:09,383 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:09,383 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 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 09:36:09,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,763 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:09,763 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 370 treesize of output 363 [2022-12-14 09:36:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,800 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:36:09,801 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 406 treesize of output 399 [2022-12-14 09:36:09,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:09,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:09,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:09,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:09,830 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:36:09,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 488 treesize of output 473 [2022-12-14 09:36:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,004 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:36:10,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 473 treesize of output 477 [2022-12-14 09:36:10,197 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:10,197 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 339 treesize of output 346 [2022-12-14 09:36:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,221 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:36:10,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 09:36:10,263 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:10,264 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 333 treesize of output 340 [2022-12-14 09:36:10,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:10,540 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:36:10,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 09:36:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,596 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:10,596 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 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 09:36:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,649 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:10,650 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 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 09:36:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:10,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:10,992 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:36:10,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2022-12-14 09:36:11,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:11,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:11,025 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-14 09:36:11,026 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 348 treesize of output 341 [2022-12-14 09:36:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:11,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:11,060 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-12-14 09:36:11,060 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 414 treesize of output 407 [2022-12-14 09:36:11,230 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-12-14 09:36:11,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-12-14 09:36:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:11,264 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:11,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 62 [2022-12-14 09:36:11,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:11,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 09:36:11,291 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 15 treesize of output 1 [2022-12-14 09:36:11,407 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 09:36:11,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2022-12-14 09:36:11,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 09:36:11,453 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 11 treesize of output 7 [2022-12-14 09:36:11,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:36:11,614 INFO L321 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2022-12-14 09:36:11,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2022-12-14 09:36:11,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:36:11,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-14 09:36:11,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-12-14 09:36:11,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:36:11,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:36:11,771 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:36:15,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5616#(and (= (select |#valid| |ULTIMATE.start_sll_remove_last_~head#1.base|) 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_#t~mem6#1.base|) 1)) (<= (+ |ULTIMATE.start_sll_remove_last_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_last_~head#1.base|)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (= |ULTIMATE.start_sll_remove_last_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_last_~head#1.base|) |ULTIMATE.start_sll_remove_last_~head#1.offset|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_last_~head#1.base|) |ULTIMATE.start_sll_remove_last_~head#1.offset|) |ULTIMATE.start_sll_remove_last_#t~mem6#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:36:15,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:36:15,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:36:15,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2022-12-14 09:36:15,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138540389] [2022-12-14 09:36:15,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:36:15,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 09:36:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:36:15,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 09:36:15,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 09:36:15,763 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:36:16,265 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-12-14 09:36:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:36:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 09:36:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:36:16,266 INFO L225 Difference]: With dead ends: 88 [2022-12-14 09:36:16,266 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 09:36:16,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=397, Invalid=2683, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 09:36:16,267 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 381 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:36:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 367 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:36:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 09:36:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-12-14 09:36:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 81 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-12-14 09:36:16,268 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 25 [2022-12-14 09:36:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:36:16,268 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-12-14 09:36:16,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-12-14 09:36:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:36:16,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:36:16,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:36:16,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:36:16,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:36:16,470 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:36:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:36:16,471 INFO L85 PathProgramCache]: Analyzing trace with hash -514349821, now seen corresponding path program 1 times [2022-12-14 09:36:16,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:36:16,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957199317] [2022-12-14 09:36:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:16,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:36:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:16,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:36:16,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:36:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957199317] [2022-12-14 09:36:16,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957199317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:36:16,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915836077] [2022-12-14 09:36:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:16,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:36:16,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:36:16,544 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:36:16,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:36:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:16,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 09:36:16,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:36:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:36:16,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:36:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:36:16,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915836077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:36:16,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159957888] [2022-12-14 09:36:16,714 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-12-14 09:36:16,714 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:36:16,715 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:36:16,715 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:36:16,715 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:36:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:36:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:36:16,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:36:16,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:16,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:16,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:36:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:16,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:16,858 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 [2022-12-14 09:36:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:36:16,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:16,886 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 [2022-12-14 09:36:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:16,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:36:17,000 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:17,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2022-12-14 09:36:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,043 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:36:17,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 338 [2022-12-14 09:36:17,084 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:17,084 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 336 treesize of output 343 [2022-12-14 09:36:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:17,426 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:36:17,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 871 treesize of output 844 [2022-12-14 09:36:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,491 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:17,491 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 2 case distinctions, treesize of input 872 treesize of output 867 [2022-12-14 09:36:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,537 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:17,537 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 2 case distinctions, treesize of input 860 treesize of output 861 [2022-12-14 09:36:17,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:17,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:17,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:17,960 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:36:17,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 393 treesize of output 378 [2022-12-14 09:36:17,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:17,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:17,991 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:17,991 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 389 treesize of output 382 [2022-12-14 09:36:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:18,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:18,024 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:36:18,024 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 449 treesize of output 442 [2022-12-14 09:36:18,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:18,193 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:36:18,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 528 treesize of output 524 [2022-12-14 09:36:18,383 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:18,383 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 346 treesize of output 353 [2022-12-14 09:36:18,415 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:18,416 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 340 treesize of output 347 [2022-12-14 09:36:18,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:18,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:18,456 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-12-14 09:36:18,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 340 treesize of output 332 [2022-12-14 09:36:18,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:18,884 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-12-14 09:36:18,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 871 treesize of output 844 [2022-12-14 09:36:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:18,964 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:18,964 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 2 case distinctions, treesize of input 872 treesize of output 867 [2022-12-14 09:36:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:19,017 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:19,018 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 2 case distinctions, treesize of input 860 treesize of output 861 [2022-12-14 09:36:19,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:19,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:19,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:19,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:19,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,378 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:36:19,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 396 treesize of output 381 [2022-12-14 09:36:19,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,410 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:19,411 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 392 treesize of output 385 [2022-12-14 09:36:19,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:19,442 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:36:19,442 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 452 treesize of output 445 [2022-12-14 09:36:19,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:19,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:19,734 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 [2022-12-14 09:36:19,803 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-12-14 09:36:19,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 33 [2022-12-14 09:36:20,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:20,421 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 [2022-12-14 09:36:20,455 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-12-14 09:36:20,699 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 [2022-12-14 09:36:20,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:20,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:20,748 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-12-14 09:36:21,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:36:21,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:36:21,060 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:36:25,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5994#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_main_~#s~0#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 09:36:25,189 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:36:25,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:36:25,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-14 09:36:25,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130350188] [2022-12-14 09:36:25,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:36:25,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:36:25,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:36:25,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:36:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:36:25,190 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:25,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:36:25,217 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-12-14 09:36:25,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:36:25,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 09:36:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:36:25,218 INFO L225 Difference]: With dead ends: 95 [2022-12-14 09:36:25,218 INFO L226 Difference]: Without dead ends: 95 [2022-12-14 09:36:25,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-12-14 09:36:25,219 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 90 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:36:25,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 79 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:36:25,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-14 09:36:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2022-12-14 09:36:25,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 90 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 104 transitions. [2022-12-14 09:36:25,220 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 104 transitions. Word has length 29 [2022-12-14 09:36:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:36:25,220 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 104 transitions. [2022-12-14 09:36:25,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 104 transitions. [2022-12-14 09:36:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:36:25,220 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:36:25,221 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] [2022-12-14 09:36:25,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:36:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 09:36:25,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:36:25,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:36:25,423 INFO L85 PathProgramCache]: Analyzing trace with hash -514352704, now seen corresponding path program 1 times [2022-12-14 09:36:25,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:36:25,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286365397] [2022-12-14 09:36:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:25,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:36:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 09:36:25,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:36:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286365397] [2022-12-14 09:36:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286365397] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:36:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579028099] [2022-12-14 09:36:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:25,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:36:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:36:25,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:36:25,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:36:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 09:36:25,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:36:25,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,761 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 14 [2022-12-14 09:36:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:36:25,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:36:25,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:25,820 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 17 treesize of output 21 [2022-12-14 09:36:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 09:36:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579028099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:36:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2025671310] [2022-12-14 09:36:25,860 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 09:36:25,860 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:36:25,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:36:25,860 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:36:25,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:36:25,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 09:36:25,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-12-14 09:36:25,925 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 [2022-12-14 09:36:25,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:25,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-12-14 09:36:25,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-14 09:36:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:25,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 09:36:26,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,012 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 [2022-12-14 09:36:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-12-14 09:36:26,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,034 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 [2022-12-14 09:36:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2022-12-14 09:36:26,135 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:26,135 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 339 treesize of output 346 [2022-12-14 09:36:26,166 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:26,166 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 333 treesize of output 340 [2022-12-14 09:36:26,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,184 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:36:26,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 315 [2022-12-14 09:36:26,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,435 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:36:26,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 659 treesize of output 640 [2022-12-14 09:36:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,479 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:26,479 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 2 case distinctions, treesize of input 664 treesize of output 665 [2022-12-14 09:36:26,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,518 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:26,518 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 2 case distinctions, treesize of input 658 treesize of output 659 [2022-12-14 09:36:26,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:26,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,918 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:36:26,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 360 treesize of output 345 [2022-12-14 09:36:26,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,951 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:26,952 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 356 treesize of output 349 [2022-12-14 09:36:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:26,982 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-12-14 09:36:26,983 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 422 treesize of output 415 [2022-12-14 09:36:27,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,139 INFO L321 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2022-12-14 09:36:27,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 441 treesize of output 445 [2022-12-14 09:36:27,325 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:27,326 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 339 treesize of output 346 [2022-12-14 09:36:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,346 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:36:27,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2022-12-14 09:36:27,377 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:36:27,378 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 1 case distinctions, treesize of input 333 treesize of output 340 [2022-12-14 09:36:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,513 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:36:27,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 354 [2022-12-14 09:36:27,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,556 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:27,556 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 2 case distinctions, treesize of input 362 treesize of output 363 [2022-12-14 09:36:27,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:27,595 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-12-14 09:36:27,596 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 2 case distinctions, treesize of input 356 treesize of output 357 [2022-12-14 09:36:27,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:27,987 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-12-14 09:36:27,987 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 364 treesize of output 357 [2022-12-14 09:36:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:28,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:28,016 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-12-14 09:36:28,016 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 400 treesize of output 393 [2022-12-14 09:36:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:28,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:28,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:36:28,042 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:36:28,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 476 treesize of output 461 [2022-12-14 09:36:28,339 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 13 treesize of output 9 [2022-12-14 09:36:28,346 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 [2022-12-14 09:36:28,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:28,400 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-12-14 09:36:28,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 33 [2022-12-14 09:36:29,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:29,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:29,068 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 [2022-12-14 09:36:29,101 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-12-14 09:36:29,392 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 13 treesize of output 9 [2022-12-14 09:36:29,402 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 [2022-12-14 09:36:29,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:29,449 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-12-14 09:36:29,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:36:29,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 09:36:29,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:36:33,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6386#(and (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_~head#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_remove_last_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_last_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= |ULTIMATE.start_sll_remove_last_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 |ULTIMATE.start_sll_remove_last_#in~head#1.base|))' at error location [2022-12-14 09:36:33,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:36:33,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:36:33,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2022-12-14 09:36:33,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563573904] [2022-12-14 09:36:33,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:36:33,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:36:33,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:36:33,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:36:33,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:36:33,979 INFO L87 Difference]: Start difference. First operand 91 states and 104 transitions. Second operand has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:36:34,108 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-12-14 09:36:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:36:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 09:36:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:36:34,109 INFO L225 Difference]: With dead ends: 92 [2022-12-14 09:36:34,109 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 09:36:34,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:36:34,110 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 244 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:36:34,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 41 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:36:34,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 09:36:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-12-14 09:36:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 84 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-12-14 09:36:34,112 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 29 [2022-12-14 09:36:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:36:34,112 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-12-14 09:36:34,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.076923076923077) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:36:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-12-14 09:36:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:36:34,113 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:36:34,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:36:34,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:36:34,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 09:36:34,314 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-12-14 09:36:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:36:34,315 INFO L85 PathProgramCache]: Analyzing trace with hash -418161121, now seen corresponding path program 3 times [2022-12-14 09:36:34,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:36:34,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101851871] [2022-12-14 09:36:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:36:34,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:36:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:36:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 09:36:34,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:36:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101851871] [2022-12-14 09:36:34,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101851871] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:36:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340354234] [2022-12-14 09:36:34,413 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:36:34,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:36:34,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:36:34,414 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:36:34,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae852608-ea7e-4800-b048-622fbf2d29aa/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:36:34,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:36:34,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:36:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 09:36:34,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:36:34,575 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:36:34,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:36:34,581 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 14 treesize of output 16 [2022-12-14 09:36:34,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:34,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 09:36:34,679 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-12-14 09:36:34,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-12-14 09:36:34,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 26 treesize of output 28 [2022-12-14 09:36:34,722 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 46 treesize of output 44 [2022-12-14 09:36:34,728 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 37 treesize of output 37 [2022-12-14 09:36:34,740 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 46 treesize of output 44 [2022-12-14 09:36:34,749 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 37 treesize of output 37 [2022-12-14 09:36:34,782 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 53 treesize of output 40 [2022-12-14 09:36:34,787 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 62 treesize of output 49 [2022-12-14 09:36:36,025 INFO L321 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2022-12-14 09:36:36,025 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 305 treesize of output 124 [2022-12-14 09:36:36,032 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:36:36,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 48 [2022-12-14 09:36:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:36:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:36:42,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:42,734 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2022-12-14 09:36:42,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:42,738 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 80 [2022-12-14 09:36:42,751 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:42,752 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 172 [2022-12-14 09:36:42,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:42,757 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 137 [2022-12-14 09:36:42,771 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimArr_10 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_10)) (.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_9))) (let ((.cse1 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (+ (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= (select v_arrayElimArr_10 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= (select v_arrayElimArr_9 .cse0) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse1)) (<= 0 (+ (select (select .cse2 (select (select .cse3 .cse1) .cse0)) (+ (select (select .cse2 .cse1) .cse0) 4)) 4)))))) (forall ((v_arrayElimArr_11 (Array Int Int)) (v_arrayElimArr_12 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.offset| Int) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_12)) (.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_11))) (let ((.cse5 (select (select .cse9 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse4 (+ (select (select .cse6 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) 4))) (or (not (= (select v_arrayElimArr_12 .cse4) |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse5)) (not (= (select v_arrayElimArr_11 .cse4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (let ((.cse7 (select (select .cse9 .cse5) .cse4)) (.cse8 (+ 4 (select (select .cse6 .cse5) .cse4)))) (<= (+ (select (select .cse6 .cse7) .cse8) 8) (select |c_#length| (select (select .cse9 .cse7) .cse8))))))))) is different from false [2022-12-14 09:36:45,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:45,014 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 122 [2022-12-14 09:36:45,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:45,020 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 151 treesize of output 101 [2022-12-14 09:36:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:36:45,103 INFO L321 Elim1Store]: treesize reduction 104, result has 53.2 percent of original size [2022-12-14 09:36:45,104 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 332 treesize of output 369 [2022-12-14 09:36:45,385 INFO L321 Elim1Store]: treesize reduction 58, result has 82.4 percent of original size [2022-12-14 09:36:45,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 898 treesize of output 922 [2022-12-14 09:36:45,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:45,447 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 786 treesize of output 718 [2022-12-14 09:36:45,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:45,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 702 treesize of output 686 [2022-12-14 09:36:55,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:55,422 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 282 treesize of output 212 [2022-12-14 09:36:55,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:36:55,430 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 241 treesize of output 161 [2022-12-14 09:36:55,882 INFO L321 Elim1Store]: treesize reduction 304, result has 63.0 percent of original size [2022-12-14 09:36:55,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 981 treesize of output 1173 [2022-12-14 09:37:06,931 WARN L233 SmtUtils]: Spent 10.99s on a formula simplification. DAG size of input: 738 DAG size of output: 511 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 09:37:06,934 INFO L321 Elim1Store]: treesize reduction 1295, result has 60.3 percent of original size [2022-12-14 09:37:06,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 28 new quantified variables, introduced 210 case distinctions, treesize of input 4869 treesize of output 5315 [2022-12-14 09:37:09,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:37:09,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 12 new quantified variables, introduced 36 case distinctions, treesize of input 4836 treesize of output 4342 [2022-12-14 09:37:10,394 INFO L217 Elim1Store]: Index analysis took 187 ms [2022-12-14 09:37:11,985 INFO L321 Elim1Store]: treesize reduction 8, result has 97.4 percent of original size [2022-12-14 09:37:11,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 3529 treesize of output 3333