./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI --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 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 --- 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-5e519f3 [2022-11-03 03:32:14,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:32:14,320 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:32:14,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:32:14,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:32:14,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:32:14,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:32:14,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:32:14,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:32:14,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:32:14,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:32:14,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:32:14,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:32:14,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:32:14,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:32:14,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:32:14,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:32:14,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:32:14,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:32:14,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:32:14,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:32:14,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:32:14,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:32:14,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:32:14,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:32:14,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:32:14,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:32:14,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:32:14,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:32:14,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:32:14,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:32:14,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:32:14,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:32:14,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:32:14,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:32:14,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:32:14,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:32:14,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:32:14,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:32:14,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:32:14,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:32:14,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 03:32:14,464 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:32:14,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:32:14,465 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:32:14,465 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:32:14,466 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:32:14,466 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:32:14,467 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:32:14,467 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:32:14,467 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:32:14,468 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:32:14,469 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:32:14,469 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:32:14,470 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:32:14,470 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:32:14,470 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:32:14,470 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:32:14,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:32:14,471 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:32:14,472 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 03:32:14,472 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 03:32:14,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:32:14,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:32:14,473 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 03:32:14,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:32:14,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:32:14,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:32:14,475 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 03:32:14,475 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 03:32:14,475 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 03:32:14,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:32:14,476 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:32:14,476 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:32:14,477 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:32:14,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:32:14,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:32:14,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:14,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:32:14,478 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:32:14,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:32:14,478 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:32:14,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:32:14,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:32:14,479 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_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 60a477b5dcc7be77af17ce3cc379f1876781ed95f896fb2ca2dbb7ba91ecb849 [2022-11-03 03:32:14,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:32:14,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:32:14,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:32:14,833 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:32:14,834 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:32:14,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2022-11-03 03:32:14,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/data/fcfcb4eb4/d4fbb20588d546469d2f83900e72df8f/FLAG8bdc8528d [2022-11-03 03:32:15,493 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:32:15,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i [2022-11-03 03:32:15,512 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/data/fcfcb4eb4/d4fbb20588d546469d2f83900e72df8f/FLAG8bdc8528d [2022-11-03 03:32:15,891 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/data/fcfcb4eb4/d4fbb20588d546469d2f83900e72df8f [2022-11-03 03:32:15,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:32:15,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:32:15,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:15,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:32:15,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:32:15,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:15,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445ce281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:15, skipping insertion in model container [2022-11-03 03:32:15,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:32:15" (1/1) ... [2022-11-03 03:32:15,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:32:15,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:32:16,419 WARN L230 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_4161f474-8cf3-4f2d-96ad-4b3656f925f1/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2022-11-03 03:32:16,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:16,442 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:32:16,513 WARN L230 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_4161f474-8cf3-4f2d-96ad-4b3656f925f1/sv-benchmarks/c/list-simple/sll2n_update_all_reverse.i[24236,24249] [2022-11-03 03:32:16,516 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:32:16,549 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:32:16,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16 WrapperNode [2022-11-03 03:32:16,550 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:32:16,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:16,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:32:16,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:32:16,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,640 INFO L138 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2022-11-03 03:32:16,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:32:16,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:32:16,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:32:16,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:32:16,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:32:16,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:32:16,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:32:16,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:32:16,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (1/1) ... [2022-11-03 03:32:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:32:16,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:16,754 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:32:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:32:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:32:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:32:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:32:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:32:16,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 03:32:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 03:32:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:32:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:32:16,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:32:16,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:32:16,912 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:32:16,914 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:32:17,249 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:32:17,404 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:32:17,404 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-03 03:32:17,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:17 BoogieIcfgContainer [2022-11-03 03:32:17,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:32:17,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:32:17,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:32:17,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:32:17,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:32:15" (1/3) ... [2022-11-03 03:32:17,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cc290b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:17, skipping insertion in model container [2022-11-03 03:32:17,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:32:16" (2/3) ... [2022-11-03 03:32:17,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cc290b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:32:17, skipping insertion in model container [2022-11-03 03:32:17,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:32:17" (3/3) ... [2022-11-03 03:32:17,423 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2022-11-03 03:32:17,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:32:17,445 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-03 03:32:17,521 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:32:17,540 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;@75c0b689, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:32:17,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-03 03:32:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:17,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:32:17,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:17,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:32:17,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2022-11-03 03:32:17,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:17,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139346240] [2022-11-03 03:32:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:17,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:17,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:17,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139346240] [2022-11-03 03:32:17,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139346240] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:17,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:17,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:32:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762611016] [2022-11-03 03:32:17,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:17,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:17,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:17,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:17,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:17,858 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 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, 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) [2022-11-03 03:32:18,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:18,010 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-11-03 03:32:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:18,013 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 [2022-11-03 03:32:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:18,022 INFO L225 Difference]: With dead ends: 76 [2022-11-03 03:32:18,023 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 03:32:18,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:18,029 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:18,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 03:32:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-03 03:32:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-03 03:32:18,068 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2022-11-03 03:32:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-03 03:32:18,069 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) [2022-11-03 03:32:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-03 03:32:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 03:32:18,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:18,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 03:32:18,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:32:18,071 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2022-11-03 03:32:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762699856] [2022-11-03 03:32:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:18,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:18,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:18,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762699856] [2022-11-03 03:32:18,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762699856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:18,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:18,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:32:18,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410962237] [2022-11-03 03:32:18,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:18,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:18,265 INFO L87 Difference]: Start difference. First operand 41 states and 46 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) [2022-11-03 03:32:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:18,413 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-03 03:32:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:18,415 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 [2022-11-03 03:32:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:18,416 INFO L225 Difference]: With dead ends: 71 [2022-11-03 03:32:18,416 INFO L226 Difference]: Without dead ends: 71 [2022-11-03 03:32:18,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:18,418 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:18,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-03 03:32:18,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2022-11-03 03:32:18,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-03 03:32:18,432 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2022-11-03 03:32:18,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:18,437 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-03 03:32:18,438 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) [2022-11-03 03:32:18,438 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-03 03:32:18,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 03:32:18,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:18,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 03:32:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:32:18,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:18,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2022-11-03 03:32:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:18,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936612255] [2022-11-03 03:32:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:18,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936612255] [2022-11-03 03:32:18,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936612255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:18,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:18,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:32:18,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477774247] [2022-11-03 03:32:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:18,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:32:18,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:32:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:18,547 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:18,596 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-03 03:32:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:32:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 03:32:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:18,603 INFO L225 Difference]: With dead ends: 46 [2022-11-03 03:32:18,603 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:32:18,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:32:18,605 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:18,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:32:18,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:32:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-03 03:32:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-03 03:32:18,617 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2022-11-03 03:32:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:18,617 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-03 03:32:18,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-03 03:32:18,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:32:18,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:18,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:32:18,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:32:18,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2022-11-03 03:32:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:18,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837812579] [2022-11-03 03:32:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:18,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:18,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:18,796 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837812579] [2022-11-03 03:32:18,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837812579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:18,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:18,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:18,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705725799] [2022-11-03 03:32:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:18,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:18,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:18,800 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:18,915 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-03 03:32:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:32:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:18,922 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:32:18,923 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 03:32:18,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:18,934 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:18,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 03:32:18,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-11-03 03:32:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-03 03:32:18,956 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2022-11-03 03:32:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:18,956 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-03 03:32:18,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-03 03:32:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 03:32:18,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:18,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 03:32:18,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:32:18,958 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:18,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2022-11-03 03:32:18,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:18,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202651712] [2022-11-03 03:32:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:19,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202651712] [2022-11-03 03:32:19,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202651712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:19,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:19,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223275885] [2022-11-03 03:32:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:19,218 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:19,304 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-03 03:32:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-03 03:32:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:19,310 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:32:19,310 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 03:32:19,312 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 [2022-11-03 03:32:19,317 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:19,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 03:32:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-11-03 03:32:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-03 03:32:19,325 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2022-11-03 03:32:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:19,325 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-03 03:32:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-03 03:32:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 03:32:19,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:19,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:19,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:32:19,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2022-11-03 03:32:19,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:19,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537313690] [2022-11-03 03:32:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:19,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:19,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537313690] [2022-11-03 03:32:19,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537313690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:19,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953330974] [2022-11-03 03:32:19,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:19,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:19,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:19,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:32:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:19,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 03:32:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:19,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:19,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953330974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:19,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684167372] [2022-11-03 03:32:19,682 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 03:32:19,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:19,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:19,699 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:19,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:19,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:19,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:19,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:19,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:19,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:19,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:20,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:20,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:20,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:20,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:20,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:20,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:20,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:32:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:20,411 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:20,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 290 treesize of output 272 [2022-11-03 03:32:20,470 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:20,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:20,531 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:20,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:21,305 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:21,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 961 treesize of output 910 [2022-11-03 03:32:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:21,436 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:21,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 958 treesize of output 953 [2022-11-03 03:32:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:21,532 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:21,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 946 treesize of output 941 [2022-11-03 03:32:22,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,240 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:22,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:32:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,292 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:22,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 294 [2022-11-03 03:32:22,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:22,337 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:22,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:32:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,538 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:22,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:32:22,810 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:22,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:22,848 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:22,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 266 [2022-11-03 03:32:22,901 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:22,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:23,446 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:23,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:32:23,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:23,522 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:23,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 949 treesize of output 898 [2022-11-03 03:32:23,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:23,613 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:23,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 946 treesize of output 941 [2022-11-03 03:32:24,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:24,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,441 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:24,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 282 [2022-11-03 03:32:24,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,484 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:24,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:32:24,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:24,527 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:24,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 359 treesize of output 352 [2022-11-03 03:32:24,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:32:24,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:32:24,717 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:27,578 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '614#(and (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_main_~new_data~0#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (= |ULTIMATE.start_sll_update_at_~head#1.base| |ULTIMATE.start_sll_update_at_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 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_update_at_~index#1| |ULTIMATE.start_sll_update_at_#in~index#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= |ULTIMATE.start_sll_update_at_~data#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (<= 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|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (= |ULTIMATE.start_sll_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:27,578 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:27,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:27,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-03 03:32:27,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123483916] [2022-11-03 03:32:27,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:27,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:32:27,580 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:27,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:27,640 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-03 03:32:27,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:27,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 10 [2022-11-03 03:32:27,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:27,641 INFO L225 Difference]: With dead ends: 43 [2022-11-03 03:32:27,641 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 03:32:27,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:32:27,642 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:27,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:27,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 03:32:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-03 03:32:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:27,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-11-03 03:32:27,646 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 10 [2022-11-03 03:32:27,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:27,647 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-11-03 03:32:27,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:27,647 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-11-03 03:32:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:32:27,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:27,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 03:32:27,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:27,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:27,865 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1276639873, now seen corresponding path program 2 times [2022-11-03 03:32:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:27,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38342342] [2022-11-03 03:32:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:32:28,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:28,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38342342] [2022-11-03 03:32:28,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38342342] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:28,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:28,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:32:28,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189417868] [2022-11-03 03:32:28,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:28,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:32:28,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:32:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:32:28,084 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:28,281 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-11-03 03:32:28,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:28,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 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 [2022-11-03 03:32:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:28,282 INFO L225 Difference]: With dead ends: 84 [2022-11-03 03:32:28,283 INFO L226 Difference]: Without dead ends: 84 [2022-11-03 03:32:28,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:32:28,284 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:28,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 60 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-03 03:32:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-11-03 03:32:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-11-03 03:32:28,288 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2022-11-03 03:32:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:28,289 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-11-03 03:32:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-11-03 03:32:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:32:28,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:28,290 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 03:32:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:32:28,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:28,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1276639872, now seen corresponding path program 1 times [2022-11-03 03:32:28,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:28,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960900604] [2022-11-03 03:32:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:32:28,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:28,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960900604] [2022-11-03 03:32:28,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960900604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:28,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:28,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:32:28,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431813551] [2022-11-03 03:32:28,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:28,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:32:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:32:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:32:28,582 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:28,762 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-11-03 03:32:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 03:32:28,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:28,764 INFO L225 Difference]: With dead ends: 70 [2022-11-03 03:32:28,764 INFO L226 Difference]: Without dead ends: 70 [2022-11-03 03:32:28,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:32:28,765 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 190 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:28,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 47 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-03 03:32:28,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-11-03 03:32:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-03 03:32:28,768 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 15 [2022-11-03 03:32:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:28,769 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-03 03:32:28,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-03 03:32:28,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:32:28,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:28,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:28,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:32:28,770 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:28,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:28,770 INFO L85 PathProgramCache]: Analyzing trace with hash -917467340, now seen corresponding path program 1 times [2022-11-03 03:32:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:28,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608024411] [2022-11-03 03:32:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:28,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:28,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608024411] [2022-11-03 03:32:28,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608024411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:28,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:28,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:32:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968178369] [2022-11-03 03:32:28,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:28,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:32:28,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:32:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:32:28,841 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:28,887 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2022-11-03 03:32:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:32:28,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 03:32:28,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:28,889 INFO L225 Difference]: With dead ends: 68 [2022-11-03 03:32:28,890 INFO L226 Difference]: Without dead ends: 68 [2022-11-03 03:32:28,890 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 [2022-11-03 03:32:28,891 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:28,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:32:28,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-03 03:32:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2022-11-03 03:32:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-03 03:32:28,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 16 [2022-11-03 03:32:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:28,895 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-03 03:32:28,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-03 03:32:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:32:28,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:28,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 03:32:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:32:28,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:28,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1509816955, now seen corresponding path program 1 times [2022-11-03 03:32:28,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:28,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83802156] [2022-11-03 03:32:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:28,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:29,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:29,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83802156] [2022-11-03 03:32:29,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83802156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:29,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:29,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:32:29,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498515805] [2022-11-03 03:32:29,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:29,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:32:29,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:29,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:32:29,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:32:29,004 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:29,083 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-11-03 03:32:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:32:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:32:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:29,084 INFO L225 Difference]: With dead ends: 65 [2022-11-03 03:32:29,084 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 03:32:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-03 03:32:29,085 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 152 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:29,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 54 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:32:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 03:32:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2022-11-03 03:32:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 50 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) [2022-11-03 03:32:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-11-03 03:32:29,088 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 17 [2022-11-03 03:32:29,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:29,089 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-11-03 03:32:29,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-11-03 03:32:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:32:29,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:29,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:32:29,090 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1509820527, now seen corresponding path program 1 times [2022-11-03 03:32:29,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:29,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078953555] [2022-11-03 03:32:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:29,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078953555] [2022-11-03 03:32:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078953555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44319480] [2022-11-03 03:32:29,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:29,761 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:29,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:32:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:29,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:32:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:29,908 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:32:29,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 03:32:29,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:30,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-03 03:32:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:30,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:30,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44319480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:30,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [541505260] [2022-11-03 03:32:30,267 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:32:30,267 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:30,268 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:30,268 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:30,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:30,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:30,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:30,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:30,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:30,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:30,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:30,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:30,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:30,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:32:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:30,636 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:30,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:32:30,710 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:30,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:32:30,760 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:30,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:32:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:31,336 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:31,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 989 treesize of output 938 [2022-11-03 03:32:31,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,420 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:31,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 986 treesize of output 981 [2022-11-03 03:32:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:31,501 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:31,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:32:32,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,116 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:32,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 282 [2022-11-03 03:32:32,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,165 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:32,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:32:32,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:32,209 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:32,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 359 treesize of output 352 [2022-11-03 03:32:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,397 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:32,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:32:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,599 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:32,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:32:32,644 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:32,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:32:32,695 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:32,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:32:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,899 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:32,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 319 [2022-11-03 03:32:32,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:32,964 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:32,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 312 treesize of output 313 [2022-11-03 03:32:33,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,049 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:33,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 294 [2022-11-03 03:32:33,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:33,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,397 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:33,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 290 [2022-11-03 03:32:33,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,438 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:33,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 294 [2022-11-03 03:32:33,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:33,484 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:33,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 379 treesize of output 372 [2022-11-03 03:32:33,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:32:33,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:32:33,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:36,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1353#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#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) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (<= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |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) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= 3 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:36,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:36,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:36,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-11-03 03:32:36,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273307223] [2022-11-03 03:32:36,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:36,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 03:32:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 03:32:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:32:36,681 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:37,491 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2022-11-03 03:32:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:32:37,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:32:37,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:37,492 INFO L225 Difference]: With dead ends: 94 [2022-11-03 03:32:37,492 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 03:32:37,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 03:32:37,494 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 473 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:37,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 188 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:32:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 03:32:37,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2022-11-03 03:32:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.6216216216216217) internal successors, (60), 51 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) [2022-11-03 03:32:37,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-03 03:32:37,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2022-11-03 03:32:37,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:37,498 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-03 03:32:37,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-03 03:32:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:32:37,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:37,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:37,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:37,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 03:32:37,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:37,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1509820528, now seen corresponding path program 1 times [2022-11-03 03:32:37,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115216342] [2022-11-03 03:32:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:37,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:38,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:38,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115216342] [2022-11-03 03:32:38,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115216342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:38,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365450684] [2022-11-03 03:32:38,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:38,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:38,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:38,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:38,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:32:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:38,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-03 03:32:38,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:38,708 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:32:38,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 03:32:38,722 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:32:38,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:32:38,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:38,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:38,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 21 [2022-11-03 03:32:38,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-03 03:32:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:39,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:45,364 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:32:45,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-03 03:32:45,438 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-03 03:32:45,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 57 [2022-11-03 03:32:45,491 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:32:45,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365450684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:45,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511265001] [2022-11-03 03:32:45,494 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:32:45,494 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:45,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:45,495 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:45,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:45,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:45,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:45,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:45,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:45,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:45,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:45,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:45,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:45,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:45,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:45,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:45,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:32:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:45,843 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:32:45,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 290 treesize of output 282 [2022-11-03 03:32:45,899 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:45,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 280 treesize of output 287 [2022-11-03 03:32:45,956 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:45,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 274 treesize of output 281 [2022-11-03 03:32:46,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,471 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:46,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 834 treesize of output 829 [2022-11-03 03:32:46,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:46,566 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:32:46,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 809 treesize of output 778 [2022-11-03 03:32:46,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:46,649 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:46,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 814 treesize of output 809 [2022-11-03 03:32:47,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,132 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:47,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 286 [2022-11-03 03:32:47,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,174 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:47,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:32:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:47,213 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:32:47,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,422 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:47,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-03 03:32:47,642 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:47,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:32:47,707 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:47,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:32:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:47,776 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:32:47,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 270 [2022-11-03 03:32:48,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,148 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:32:48,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 559 treesize of output 544 [2022-11-03 03:32:48,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,212 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:48,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 564 treesize of output 565 [2022-11-03 03:32:48,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,268 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:48,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 558 treesize of output 559 [2022-11-03 03:32:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,690 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:48,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 332 treesize of output 317 [2022-11-03 03:32:48,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,735 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:48,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 328 treesize of output 321 [2022-11-03 03:32:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:48,774 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:32:48,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 412 treesize of output 405 [2022-11-03 03:32:49,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:32:49,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:32:49,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:32:52,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1653#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#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) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (or (not (<= 0 |ULTIMATE.start_sll_update_at_~head#1.offset|)) (not (<= (+ 4 |ULTIMATE.start_sll_update_at_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_update_at_~head#1.base|)))) (<= 3 |ULTIMATE.start_sll_update_at_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |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) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_main_~new_data~0#1|) (<= 3 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:32:52,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:32:52,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:32:52,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 26 [2022-11-03 03:32:52,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627944737] [2022-11-03 03:32:52,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:32:52,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:32:52,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:32:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:32:52,254 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:54,145 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2022-11-03 03:32:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:32:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:32:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:54,146 INFO L225 Difference]: With dead ends: 157 [2022-11-03 03:32:54,146 INFO L226 Difference]: Without dead ends: 157 [2022-11-03 03:32:54,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 03:32:54,148 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1616 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1616 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:54,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1616 Valid, 153 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 535 Invalid, 0 Unknown, 26 Unchecked, 0.6s Time] [2022-11-03 03:32:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-03 03:32:54,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 58. [2022-11-03 03:32:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.627906976744186) internal successors, (70), 57 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) [2022-11-03 03:32:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-03 03:32:54,162 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 17 [2022-11-03 03:32:54,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:54,162 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-03 03:32:54,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-03 03:32:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 03:32:54,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:54,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:54,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:32:54,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 03:32:54,367 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2022-11-03 03:32:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:54,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790967883] [2022-11-03 03:32:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:32:54,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:54,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790967883] [2022-11-03 03:32:54,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790967883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:32:54,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:32:54,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:32:54,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178864978] [2022-11-03 03:32:54,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:32:54,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:32:54,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:32:54,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:32:54,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:32:54,502 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:32:54,581 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-11-03 03:32:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:32:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-03 03:32:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:32:54,584 INFO L225 Difference]: With dead ends: 69 [2022-11-03 03:32:54,585 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 03:32:54,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:32:54,586 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:32:54,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:32:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 03:32:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2022-11-03 03:32:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 57 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) [2022-11-03 03:32:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-11-03 03:32:54,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 19 [2022-11-03 03:32:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:32:54,593 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-11-03 03:32:54,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-11-03 03:32:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:32:54,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:32:54,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:32:54,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 03:32:54,599 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:32:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:32:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1486050158, now seen corresponding path program 1 times [2022-11-03 03:32:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:32:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817449242] [2022-11-03 03:32:54,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:32:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:32:54,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:32:54,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817449242] [2022-11-03 03:32:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817449242] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:32:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650649749] [2022-11-03 03:32:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:32:54,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:32:54,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:32:54,687 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:32:54,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:32:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:32:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:32:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:32:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:32:54,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:32:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:32:54,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650649749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:32:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646163735] [2022-11-03 03:32:54,908 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 03:32:54,908 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:32:54,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:32:54,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:32:54,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:32:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:54,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:54,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:54,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:54,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:32:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:55,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:32:55,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:55,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:55,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:55,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:32:55,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:32:55,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:32:55,268 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:55,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:32:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,303 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:55,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 273 [2022-11-03 03:32:55,357 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:55,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:32:55,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,614 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:55,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:32:55,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:55,674 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:55,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 570 treesize of output 571 [2022-11-03 03:32:55,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:55,744 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:55,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 551 treesize of output 532 [2022-11-03 03:32:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,143 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:56,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 286 [2022-11-03 03:32:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,185 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:56,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:32:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:56,225 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:32:56,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 302 [2022-11-03 03:32:56,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,406 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:32:56,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-03 03:32:56,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:56,597 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:32:56,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:32:56,649 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:56,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:32:56,709 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:32:56,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:32:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,030 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:57,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:32:57,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,102 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:32:57,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 570 treesize of output 571 [2022-11-03 03:32:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,173 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:32:57,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 551 treesize of output 532 [2022-11-03 03:32:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,620 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:32:57,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 317 treesize of output 310 [2022-11-03 03:32:57,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:32:57,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,661 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:32:57,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 363 treesize of output 348 [2022-11-03 03:32:57,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:32:57,703 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:32:57,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 359 treesize of output 352 [2022-11-03 03:32:57,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:32:57,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:32:57,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:32:58,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:32:58,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:32:58,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:32:58,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:32:58,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:32:58,187 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:01,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [646163735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:01,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:01,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [4, 4, 4] total 17 [2022-11-03 03:33:01,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657113161] [2022-11-03 03:33:01,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:01,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:33:01,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:01,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:33:01,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:33:01,051 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:01,762 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-11-03 03:33:01,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:33:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 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 [2022-11-03 03:33:01,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:01,763 INFO L225 Difference]: With dead ends: 63 [2022-11-03 03:33:01,763 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:33:01,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-11-03 03:33:01,764 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 73 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:01,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 53 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:33:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:33:01,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2022-11-03 03:33:01,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-03 03:33:01,767 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 21 [2022-11-03 03:33:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:01,767 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-03 03:33:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-03 03:33:01,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:33:01,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:01,769 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-03 03:33:01,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:01,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 03:33:01,981 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1063622353, now seen corresponding path program 1 times [2022-11-03 03:33:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688496826] [2022-11-03 03:33:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:01,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:33:02,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:02,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688496826] [2022-11-03 03:33:02,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688496826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:02,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73911825] [2022-11-03 03:33:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:02,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:02,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:02,113 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:02,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:33:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:33:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:33:02,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:33:02,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73911825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1557295150] [2022-11-03 03:33:02,342 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-03 03:33:02,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:02,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:02,343 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:02,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:02,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:02,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:02,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:02,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:02,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:02,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:33:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:02,651 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:02,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 290 treesize of output 272 [2022-11-03 03:33:02,699 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:02,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:02,750 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:02,751 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:03,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,202 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:03,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 961 treesize of output 910 [2022-11-03 03:33:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:03,285 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:03,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 958 treesize of output 953 [2022-11-03 03:33:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:03,358 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:03,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 946 treesize of output 941 [2022-11-03 03:33:03,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,937 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:03,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 303 treesize of output 296 [2022-11-03 03:33:03,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:03,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:03,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:03,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,978 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:03,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 337 treesize of output 322 [2022-11-03 03:33:03,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:04,020 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:33:04,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 333 treesize of output 326 [2022-11-03 03:33:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:04,194 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:04,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 388 treesize of output 391 [2022-11-03 03:33:04,388 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:04,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:33:04,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:04,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:04,414 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:04,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 266 [2022-11-03 03:33:04,461 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:04,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:33:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:04,838 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:04,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 961 treesize of output 910 [2022-11-03 03:33:04,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:04,928 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:04,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 958 treesize of output 953 [2022-11-03 03:33:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:04,999 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:04,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 946 treesize of output 941 [2022-11-03 03:33:05,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:05,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:05,604 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:05,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 286 [2022-11-03 03:33:05,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:05,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:05,647 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:05,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:33:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:05,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:05,698 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:33:05,699 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 321 treesize of output 314 [2022-11-03 03:33:05,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 03:33:05,856 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 03:33:05,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 03:33:05,934 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:05,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:05,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:06,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:06,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:06,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:06,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:06,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:06,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:06,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:33:06,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:06,241 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:08,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2433#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~data#1| 3) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#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) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_update_at_~data#1| 3) (<= |ULTIMATE.start_sll_update_at_~index#1| 0) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |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) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_update_at_#in~index#1| 1) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_~new_data~0#1| 3) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:08,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:08,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:08,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-03 03:33:08,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541129787] [2022-11-03 03:33:08,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:08,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:33:08,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:08,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:33:08,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:33:08,962 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:09,070 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-03 03:33:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:33:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:33:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:09,071 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:33:09,071 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 03:33:09,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:33:09,072 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 113 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:09,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 65 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 03:33:09,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-11-03 03:33:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 45 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) [2022-11-03 03:33:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-11-03 03:33:09,074 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 22 [2022-11-03 03:33:09,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:09,075 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-11-03 03:33:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-11-03 03:33:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:33:09,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:09,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:09,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:09,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 03:33:09,285 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:09,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1051784736, now seen corresponding path program 1 times [2022-11-03 03:33:09,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:09,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530502731] [2022-11-03 03:33:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:09,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:09,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530502731] [2022-11-03 03:33:09,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530502731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:09,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685988874] [2022-11-03 03:33:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:09,385 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:09,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:33:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:09,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:33:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:09,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:33:09,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:33:09,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685988874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:09,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:33:09,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-03 03:33:09,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808465271] [2022-11-03 03:33:09,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:09,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:33:09,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:33:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:09,582 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:09,687 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-11-03 03:33:09,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:33:09,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-03 03:33:09,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:09,688 INFO L225 Difference]: With dead ends: 63 [2022-11-03 03:33:09,688 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 03:33:09,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:09,689 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:09,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 40 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 03:33:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-11-03 03:33:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-11-03 03:33:09,691 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2022-11-03 03:33:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:09,692 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-11-03 03:33:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-11-03 03:33:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:33:09,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:09,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:09,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:09,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 03:33:09,905 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1051784735, now seen corresponding path program 1 times [2022-11-03 03:33:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:09,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018937752] [2022-11-03 03:33:09,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:33:10,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018937752] [2022-11-03 03:33:10,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018937752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:10,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:10,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:33:10,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146439327] [2022-11-03 03:33:10,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:10,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:10,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:10,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:10,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:10,168 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:10,339 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-11-03 03:33:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:10,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-11-03 03:33:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:10,340 INFO L225 Difference]: With dead ends: 65 [2022-11-03 03:33:10,340 INFO L226 Difference]: Without dead ends: 65 [2022-11-03 03:33:10,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:10,341 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:10,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-03 03:33:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 49. [2022-11-03 03:33:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:10,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-03 03:33:10,344 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 24 [2022-11-03 03:33:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:10,344 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-03 03:33:10,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:10,345 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-03 03:33:10,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:33:10,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:10,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:10,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 03:33:10,350 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:10,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1447748933, now seen corresponding path program 1 times [2022-11-03 03:33:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68588979] [2022-11-03 03:33:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:10,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:11,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68588979] [2022-11-03 03:33:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68588979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134642881] [2022-11-03 03:33:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:11,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:11,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:11,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:11,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:33:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:33:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:11,498 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:11,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:33:11,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:11,688 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:11,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2022-11-03 03:33:11,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:11,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 26 [2022-11-03 03:33:11,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-03 03:33:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:11,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:16,424 INFO L356 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-11-03 03:33:16,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 20 [2022-11-03 03:33:16,430 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) is different from false [2022-11-03 03:33:16,440 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_893) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2022-11-03 03:33:16,449 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_893) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) .cse0)))) is different from false [2022-11-03 03:33:16,455 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_893 (Array Int Int))) (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_893) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))))) is different from false [2022-11-03 03:33:16,463 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:16,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 23 [2022-11-03 03:33:16,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 24 [2022-11-03 03:33:16,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 03:33:16,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-11-03 03:33:16,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134642881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:16,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587054037] [2022-11-03 03:33:16,502 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:33:16,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:16,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:16,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:16,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:16,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:16,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:16,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:16,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:16,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:16,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:16,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:16,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:33:16,833 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:16,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:16,868 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:16,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 273 [2022-11-03 03:33:16,917 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:16,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:17,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,300 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:17,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 989 treesize of output 938 [2022-11-03 03:33:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,370 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:17,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 986 treesize of output 981 [2022-11-03 03:33:17,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:17,444 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:17,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:33:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:17,979 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:17,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:33:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:18,014 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:18,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 294 [2022-11-03 03:33:18,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:18,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:18,050 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:18,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:33:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,190 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:18,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-03 03:33:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,355 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:18,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:33:18,401 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:18,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:18,457 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:18,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,679 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:18,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:33:18,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:18,740 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:18,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 557 treesize of output 538 [2022-11-03 03:33:18,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:18,828 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:18,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:33:19,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:19,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:19,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:19,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:19,179 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:19,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 282 [2022-11-03 03:33:19,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:19,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:19,237 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:19,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:33:19,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:19,282 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:19,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:33:19,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:19,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:19,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:19,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:19,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:19,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:19,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:33:19,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:19,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:23,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3054#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 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) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |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) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:23,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:23,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:23,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 32 [2022-11-03 03:33:23,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831994453] [2022-11-03 03:33:23,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:23,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 03:33:23,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 03:33:23,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1648, Unknown=5, NotChecked=340, Total=2162 [2022-11-03 03:33:23,716 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:25,051 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-11-03 03:33:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:33:25,052 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 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 26 [2022-11-03 03:33:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:25,053 INFO L225 Difference]: With dead ends: 86 [2022-11-03 03:33:25,053 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 03:33:25,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=383, Invalid=3050, Unknown=5, NotChecked=468, Total=3906 [2022-11-03 03:33:25,055 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 329 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:25,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 242 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 650 Invalid, 0 Unknown, 375 Unchecked, 0.6s Time] [2022-11-03 03:33:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 03:33:25,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 52. [2022-11-03 03:33:25,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 51 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) [2022-11-03 03:33:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2022-11-03 03:33:25,060 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 26 [2022-11-03 03:33:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:25,060 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2022-11-03 03:33:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.03125) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2022-11-03 03:33:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 03:33:25,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:25,063 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:25,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 03:33:25,273 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1447748932, now seen corresponding path program 1 times [2022-11-03 03:33:25,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:25,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886156714] [2022-11-03 03:33:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:26,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886156714] [2022-11-03 03:33:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886156714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919405983] [2022-11-03 03:33:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:26,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:26,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:26,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:33:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 03:33:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:26,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:26,995 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:26,995 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:33:27,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:27,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:27,289 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:27,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 53 [2022-11-03 03:33:27,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 41 [2022-11-03 03:33:27,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 34 [2022-11-03 03:33:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:27,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 40 treesize of output 33 [2022-11-03 03:33:27,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 21 [2022-11-03 03:33:27,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-03 03:33:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:27,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:28,997 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int)) (or (forall ((v_ArrVal_1007 Int)) (<= 0 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int)) (or (forall ((v_ArrVal_1007 Int) (v_ArrVal_1009 Int)) (<= (+ 4 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse1)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))))) is different from false [2022-11-03 03:33:29,018 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:29,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 64 treesize of output 68 [2022-11-03 03:33:29,120 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1005 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1007 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|) (< (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1005) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse0) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 1)))) (forall ((v_prenex_4 Int) (v_prenex_3 Int) (v_prenex_2 (Array Int Int))) (or (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_prenex_2) |c_ULTIMATE.start_main_~s~0#1.base|) v_prenex_3 v_prenex_4) .cse0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| v_prenex_3))) (forall ((v_ArrVal_1006 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1009 Int)) (or (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1006) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse0) |c_ULTIMATE.start_sll_update_at_~head#1.base|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))))) is different from false [2022-11-03 03:33:29,192 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1005 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1007 Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1005) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse2) 1)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))) (forall ((v_ArrVal_1006 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1009 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1006) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse1)))) (forall ((v_prenex_4 Int) (v_prenex_3 Int) (v_prenex_2 (Array Int Int))) (or (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_2) |c_ULTIMATE.start_main_~s~0#1.base|) v_prenex_3 v_prenex_4) .cse1)) (< |c_ULTIMATE.start_main_~s~0#1.offset| v_prenex_3)))))) is different from false [2022-11-03 03:33:29,255 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1006 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1009 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1006) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse1)))) (forall ((v_prenex_4 Int) (v_prenex_3 Int) (v_prenex_2 (Array Int Int))) (or (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_2) |c_ULTIMATE.start_main_~s~0#1.base|) v_prenex_3 v_prenex_4) .cse1)) (< |c_ULTIMATE.start_main_~s~0#1.offset| v_prenex_3))) (forall ((v_ArrVal_1005 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1007 Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1005) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) 1)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|)))))) is different from false [2022-11-03 03:33:29,287 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (and (forall ((v_ArrVal_1006 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1009 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|) (= .cse0 (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1006) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse1)))) (forall ((v_ArrVal_1005 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int) (v_ArrVal_1007 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|) (< (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1005) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) 1)))) (forall ((v_prenex_4 Int) (v_prenex_3 Int) (v_prenex_2 (Array Int Int))) (or (<= 0 (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_prenex_2) |c_ULTIMATE.start_sll_create_~head~0#1.base|) v_prenex_3 v_prenex_4) .cse1)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| v_prenex_3)))))) is different from false [2022-11-03 03:33:29,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:29,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 90 treesize of output 81 [2022-11-03 03:33:29,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 127 treesize of output 117 [2022-11-03 03:33:29,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2022-11-03 03:33:29,331 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:29,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 118 treesize of output 119 [2022-11-03 03:33:29,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 135 treesize of output 131 [2022-11-03 03:33:29,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 132 [2022-11-03 03:33:29,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 147 [2022-11-03 03:33:29,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 145 [2022-11-03 03:33:29,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 146 [2022-11-03 03:33:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-03 03:33:29,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919405983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:29,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048510712] [2022-11-03 03:33:29,673 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-03 03:33:29,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:29,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:29,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:29,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:29,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:29,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:29,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:29,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:29,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:29,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:29,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:29,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:29,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:33:29,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:29,987 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:29,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:33:30,044 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:30,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:30,096 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:30,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:30,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:30,431 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:30,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 735 treesize of output 730 [2022-11-03 03:33:30,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:30,496 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:30,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 710 treesize of output 679 [2022-11-03 03:33:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:30,574 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:30,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 711 treesize of output 712 [2022-11-03 03:33:31,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:31,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:31,059 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:31,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 311 [2022-11-03 03:33:31,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:31,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:31,097 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:33:31,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 396 treesize of output 389 [2022-11-03 03:33:31,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:31,136 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:31,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 442 treesize of output 427 [2022-11-03 03:33:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,344 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:31,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 427 treesize of output 422 [2022-11-03 03:33:31,583 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:31,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:31,642 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:31,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:31,674 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:31,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 267 [2022-11-03 03:33:32,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,080 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:32,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 989 treesize of output 938 [2022-11-03 03:33:32,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,152 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:32,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 986 treesize of output 981 [2022-11-03 03:33:32,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,213 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:32,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:33:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,882 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:32,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 282 [2022-11-03 03:33:32,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,921 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:32,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:33:32,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:32,961 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:32,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:33:33,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:33,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:33,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:33,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:33,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:33,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:33,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:33,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:33:33,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:38,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3429#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (or (not (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)))) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |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) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:33:38,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:38,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:38,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 39 [2022-11-03 03:33:38,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156748959] [2022-11-03 03:33:38,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:38,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:33:38,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:38,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:33:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2158, Unknown=5, NotChecked=490, Total=2862 [2022-11-03 03:33:38,233 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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) [2022-11-03 03:33:41,251 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (= (select .cse0 4) 0) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= 8 (select |c_#length| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int)) (or (forall ((v_ArrVal_1007 Int)) (<= 0 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_53| Int)) (or (forall ((v_ArrVal_1007 Int) (v_ArrVal_1009 Int)) (<= (+ 4 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1007) .cse1)) (select |c_#length| (select (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_53| v_ArrVal_1009) .cse1)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_53|))) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse2 4)))) is different from false [2022-11-03 03:33:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:42,113 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-11-03 03:33:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 03:33:42,114 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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) Word has length 26 [2022-11-03 03:33:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:42,114 INFO L225 Difference]: With dead ends: 88 [2022-11-03 03:33:42,114 INFO L226 Difference]: Without dead ends: 88 [2022-11-03 03:33:42,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=446, Invalid=3478, Unknown=6, NotChecked=762, Total=4692 [2022-11-03 03:33:42,117 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 378 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:42,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 402 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 668 Invalid, 0 Unknown, 442 Unchecked, 0.6s Time] [2022-11-03 03:33:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-03 03:33:42,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2022-11-03 03:33:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.425) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-03 03:33:42,119 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 26 [2022-11-03 03:33:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:42,120 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-03 03:33:42,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 40 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) [2022-11-03 03:33:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-03 03:33:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:33:42,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:42,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:42,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:42,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:42,332 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:42,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:42,332 INFO L85 PathProgramCache]: Analyzing trace with hash 282739415, now seen corresponding path program 1 times [2022-11-03 03:33:42,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:42,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790079488] [2022-11-03 03:33:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:42,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:44,057 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:44,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:44,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790079488] [2022-11-03 03:33:44,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790079488] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284265452] [2022-11-03 03:33:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:44,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:44,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:44,059 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:44,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:33:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:44,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-03 03:33:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:44,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:44,351 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:33:44,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:33:44,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:44,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-11-03 03:33:44,647 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:33:44,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 65 [2022-11-03 03:33:44,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 23 [2022-11-03 03:33:44,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 38 [2022-11-03 03:33:44,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:44,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 38 [2022-11-03 03:33:44,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:33:44,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:44,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-03 03:33:44,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 71 treesize of output 47 [2022-11-03 03:33:44,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2022-11-03 03:33:45,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 23 [2022-11-03 03:33:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:33:45,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:45,376 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1124) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1125)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1127)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) .cse3)) (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (<= .cse3 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1124) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1125)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse2 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1127)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 1))))) is different from false [2022-11-03 03:33:45,416 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1124) (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1)) (select (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1)) .cse3)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (<= .cse3 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1124) (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1)) (select (store .cse2 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1)) 1))))))) is different from false [2022-11-03 03:33:45,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:45,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 45 [2022-11-03 03:33:45,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:45,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 97 [2022-11-03 03:33:45,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-11-03 03:33:45,527 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:45,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 47 [2022-11-03 03:33:45,543 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:33:45,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 101 [2022-11-03 03:33:45,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2022-11-03 03:33:45,622 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (< |c_ULTIMATE.start_sll_update_at_~data#1| .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (<= .cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))))) is different from false [2022-11-03 03:33:45,709 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (< |c_ULTIMATE.start_sll_update_at_~data#1| .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= .cse1 (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse3) (select (store (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse2))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (<= .cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|)))))) is different from false [2022-11-03 03:33:45,786 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) .cse0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (< |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~len~0#1|) (<= |c_ULTIMATE.start_main_~len~0#1| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|)))))) is different from false [2022-11-03 03:33:45,822 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) .cse0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1) (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1121) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))))) is different from false [2022-11-03 03:33:45,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:45,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 03:33:45,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:45,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 03:33:45,859 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:33:45,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2022-11-03 03:33:45,866 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:33:45,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2022-11-03 03:33:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-03 03:33:46,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284265452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:46,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837517296] [2022-11-03 03:33:46,005 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 03:33:46,005 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:46,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:46,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:46,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:46,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:33:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:46,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:33:46,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:46,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:46,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:46,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:33:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:33:46,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,341 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:46,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:33:46,396 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:46,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:46,448 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:46,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,742 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:46,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:33:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:46,828 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:46,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 570 treesize of output 571 [2022-11-03 03:33:46,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:46,906 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:46,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 551 treesize of output 532 [2022-11-03 03:33:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,408 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:33:47,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 286 [2022-11-03 03:33:47,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,447 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:47,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:33:47,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,495 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:33:47,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 302 [2022-11-03 03:33:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,666 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:33:47,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-03 03:33:47,855 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:47,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:33:47,903 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:33:47,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:33:47,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,931 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:47,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 267 [2022-11-03 03:33:48,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,237 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:48,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:33:48,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,297 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:33:48,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 557 treesize of output 538 [2022-11-03 03:33:48,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,368 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:33:48,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:33:48,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,767 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:33:48,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 311 [2022-11-03 03:33:48,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,810 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:33:48,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 360 treesize of output 353 [2022-11-03 03:33:48,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,845 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:33:48,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 442 treesize of output 427 [2022-11-03 03:33:49,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:49,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:49,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:49,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:49,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:33:49,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:33:49,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:33:49,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:33:49,386 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:54,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3827#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= 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) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 1 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |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) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 3 |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:33:54,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:54,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:54,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 48 [2022-11-03 03:33:54,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546637804] [2022-11-03 03:33:54,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:54,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-03 03:33:54,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-03 03:33:54,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2950, Unknown=6, NotChecked=690, Total=3906 [2022-11-03 03:33:54,386 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:55,583 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select .cse2 .cse1)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base|) 1) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) .cse0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (not (= (select .cse2 4) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select .cse3 .cse1) (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1121) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= |c_ULTIMATE.start_sll_create_~head~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1119) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1) |c_ULTIMATE.start_sll_create_~head~0#1.base|))))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1) (= |c_ULTIMATE.start_main_~len~0#1| 2) (= (select .cse3 4) 0)))) is different from false [2022-11-03 03:33:56,328 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse1 (select .cse0 .cse2)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse0 4))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2) |c_ULTIMATE.start_main_~s~0#1.base|))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2) .cse1)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= (select .cse3 4) 0) (< |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~len~0#1|) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~len~0#1| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse2) (select .cse3 .cse2))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= |c_ULTIMATE.start_main_~len~0#1| 2) (= |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2022-11-03 03:33:57,107 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4))) (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse1 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse6)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse5 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|) .cse6))) (and (< |c_ULTIMATE.start_sll_update_at_~data#1| .cse0) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|) (= .cse1 .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= .cse2 (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse3))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0) (= .cse2 (select .cse4 4)) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| |c_ULTIMATE.start_sll_update_at_~head#1.offset|) (not (= .cse2 |c_ULTIMATE.start_main_~s~0#1.base|)) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select .cse4 .cse3))) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= .cse5 (select (store (select (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse3))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (<= .cse0 .cse1) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse3)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= .cse5 0) (= |c_ULTIMATE.start_main_~len~0#1| 2) (= |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2022-11-03 03:33:58,003 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (< |c_ULTIMATE.start_sll_update_at_~data#1| .cse0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (not (= |c_ULTIMATE.start_main_~s~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) 4) 0) (= |c_ULTIMATE.start_sll_update_at_~head#1.offset| 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= |c_ULTIMATE.start_sll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1119 (Array Int Int)) (v_ArrVal_1125 Int)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1119) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse1))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (<= .cse0 (+ |c_ULTIMATE.start_sll_update_at_~data#1| 1)) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1121 (Array Int Int)) (v_ArrVal_1127 Int)) (= (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1121) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse1) |c_ULTIMATE.start_sll_update_at_~head#1.offset|)))) (= |c_ULTIMATE.start_main_~len~0#1| 2) (= |c_ULTIMATE.start_main_~i~0#1| 1))) is different from false [2022-11-03 03:33:58,072 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (let ((.cse4 (* |c_ULTIMATE.start_main_~len~0#1| 2)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) (.cse6 (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (.cse5 (select (select |c_#memory_int| .cse0) 0))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1124) (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2)) (select (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse2)) .cse4)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|))) (= (select .cse3 4) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_63| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_63|) (forall ((v_ArrVal_1124 (Array Int Int)) (v_ArrVal_1125 Int) (v_ArrVal_1127 Int)) (<= .cse4 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_1124) (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1125) .cse2)) (select (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_63| v_ArrVal_1127) .cse2)) 1))))) (<= .cse5 .cse6) (<= .cse6 .cse5) (= |c_ULTIMATE.start_main_~len~0#1| 2))))) is different from false [2022-11-03 03:33:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:59,237 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-11-03 03:33:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:33:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 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 28 [2022-11-03 03:33:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:59,239 INFO L225 Difference]: With dead ends: 85 [2022-11-03 03:33:59,239 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 03:33:59,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 11 IntricatePredicates, 1 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=459, Invalid=4404, Unknown=11, NotChecked=1606, Total=6480 [2022-11-03 03:33:59,241 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 198 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:59,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 436 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 615 Invalid, 0 Unknown, 265 Unchecked, 0.6s Time] [2022-11-03 03:33:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 03:33:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2022-11-03 03:33:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 54 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) [2022-11-03 03:33:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-11-03 03:33:59,244 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 28 [2022-11-03 03:33:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:59,244 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-11-03 03:33:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 48 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-11-03 03:33:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 03:33:59,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:59,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:59,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:59,446 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:59,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash 280386878, now seen corresponding path program 2 times [2022-11-03 03:33:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:59,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372381171] [2022-11-03 03:33:59,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:59,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:59,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 03:33:59,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:59,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372381171] [2022-11-03 03:33:59,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372381171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:59,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:59,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:33:59,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154903673] [2022-11-03 03:33:59,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:59,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:33:59,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:59,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:33:59,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:33:59,566 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:59,626 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-11-03 03:33:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:33:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-03 03:33:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:59,627 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:33:59,627 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 03:33:59,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:33:59,628 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:59,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 23 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:33:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 03:33:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 03:33:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.275) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-03 03:33:59,630 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2022-11-03 03:33:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:59,630 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-03 03:33:59,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-03 03:33:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:33:59,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:59,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:59,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 03:33:59,633 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:59,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1131037742, now seen corresponding path program 1 times [2022-11-03 03:33:59,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:59,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709842849] [2022-11-03 03:33:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 03:33:59,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709842849] [2022-11-03 03:33:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709842849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:33:59,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:33:59,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:33:59,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702695699] [2022-11-03 03:33:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:33:59,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:33:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:33:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:33:59,764 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:59,893 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-03 03:33:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:33:59,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 03:33:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:59,894 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:33:59,894 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 03:33:59,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:33:59,895 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 153 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:59,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 22 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 03:33:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-11-03 03:33:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-11-03 03:33:59,897 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2022-11-03 03:33:59,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:59,897 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-11-03 03:33:59,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-11-03 03:33:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 03:33:59,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:59,898 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:59,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-03 03:33:59,898 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:33:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1131036516, now seen corresponding path program 1 times [2022-11-03 03:33:59,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:59,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577435912] [2022-11-03 03:33:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:59,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:59,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:33:59,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577435912] [2022-11-03 03:33:59,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577435912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:59,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345743946] [2022-11-03 03:33:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:59,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:59,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:00,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:00,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:34:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 03:34:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:00,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:00,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:00,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345743946] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:00,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1627018075] [2022-11-03 03:34:00,344 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 03:34:00,344 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:00,345 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:00,345 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:00,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:00,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:00,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:00,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:00,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:00,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:00,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:00,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:00,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:00,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:00,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:34:00,708 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:00,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:00,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:00,747 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:00,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 266 [2022-11-03 03:34:00,823 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:00,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:01,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,127 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:01,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:34:01,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,208 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:01,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 543 treesize of output 524 [2022-11-03 03:34:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,294 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:01,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 548 treesize of output 549 [2022-11-03 03:34:01,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,686 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:01,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 314 treesize of output 307 [2022-11-03 03:34:01,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,729 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:01,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 354 treesize of output 339 [2022-11-03 03:34:01,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:01,775 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:01,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 350 treesize of output 343 [2022-11-03 03:34:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:01,964 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:01,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 417 treesize of output 420 [2022-11-03 03:34:02,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,201 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:02,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 290 treesize of output 272 [2022-11-03 03:34:02,253 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:02,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:34:02,309 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:02,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:34:02,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,639 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:02,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 714 treesize of output 709 [2022-11-03 03:34:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:02,706 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:02,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 689 treesize of output 658 [2022-11-03 03:34:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:02,777 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:02,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 690 treesize of output 691 [2022-11-03 03:34:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,263 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:03,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 282 [2022-11-03 03:34:03,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,301 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:03,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:34:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:03,337 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:03,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:34:03,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:03,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:03,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:03,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:03,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:03,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:04,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:04,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:34:04,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:08,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4427#(and (= |ULTIMATE.start_sll_destroy_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (< |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|) (not (= |ULTIMATE.start_sll_destroy_~head#1.base| 0)) (= |ULTIMATE.start_sll_destroy_~head#1.base| |ULTIMATE.start_sll_destroy_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= |ULTIMATE.start_sll_destroy_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_#in~head#1.offset| |ULTIMATE.start_sll_destroy_~head#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:08,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:08,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:08,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-03 03:34:08,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667089977] [2022-11-03 03:34:08,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:08,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:34:08,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:34:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:34:08,311 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:08,521 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-03 03:34:08,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 03:34:08,521 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-03 03:34:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:08,522 INFO L225 Difference]: With dead ends: 55 [2022-11-03 03:34:08,522 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:34:08,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 03:34:08,523 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 102 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:08,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 42 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:34:08,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-03 03:34:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.255813953488372) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-03 03:34:08,526 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 30 [2022-11-03 03:34:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:08,527 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-03 03:34:08,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-03 03:34:08,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 03:34:08,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:08,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:08,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 03:34:08,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-03 03:34:08,741 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:08,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:08,741 INFO L85 PathProgramCache]: Analyzing trace with hash 224119269, now seen corresponding path program 1 times [2022-11-03 03:34:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:08,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846047028] [2022-11-03 03:34:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:08,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:09,249 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:09,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:09,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846047028] [2022-11-03 03:34:09,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846047028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572263281] [2022-11-03 03:34:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:09,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:09,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:09,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:34:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-03 03:34:09,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:09,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:09,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 10 [2022-11-03 03:34:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:09,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:09,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 32 [2022-11-03 03:34:09,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:09,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572263281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:10,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [932912057] [2022-11-03 03:34:10,069 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 03:34:10,069 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:10,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:10,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:10,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:10,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:10,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:10,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:10,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:10,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:10,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:10,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:10,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:34:10,450 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:10,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:10,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,486 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:10,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 273 [2022-11-03 03:34:10,549 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:10,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:10,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:10,869 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:10,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:34:10,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:10,944 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:10,945 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 557 treesize of output 538 [2022-11-03 03:34:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,023 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:11,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:34:11,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:11,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:11,393 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:11,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 327 treesize of output 320 [2022-11-03 03:34:11,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:11,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:11,436 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:34:11,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 411 treesize of output 404 [2022-11-03 03:34:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:11,475 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:11,475 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 463 treesize of output 448 [2022-11-03 03:34:11,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,666 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:11,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 448 treesize of output 443 [2022-11-03 03:34:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:11,826 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:11,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:34:11,877 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:11,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:11,924 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:11,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:12,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:12,298 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:12,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1002 treesize of output 997 [2022-11-03 03:34:12,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:12,364 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:12,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 977 treesize of output 926 [2022-11-03 03:34:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:12,437 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:12,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:34:12,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:12,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:12,957 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:12,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:34:12,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:12,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:12,994 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:12,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 294 [2022-11-03 03:34:13,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:13,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:13,029 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:13,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 298 [2022-11-03 03:34:13,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:13,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:13,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:13,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:13,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:13,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:13,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:34:13,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:13,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:17,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4776#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#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) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |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) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:34:17,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:17,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:17,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-03 03:34:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088508396] [2022-11-03 03:34:17,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:34:17,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:34:17,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 03:34:17,648 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:18,271 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-11-03 03:34:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:34:18,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-03 03:34:18,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:18,274 INFO L225 Difference]: With dead ends: 67 [2022-11-03 03:34:18,274 INFO L226 Difference]: Without dead ends: 67 [2022-11-03 03:34:18,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 03:34:18,275 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 151 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:18,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 225 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 03:34:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-03 03:34:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2022-11-03 03:34:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 50 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-11-03 03:34:18,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 32 [2022-11-03 03:34:18,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:18,278 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-11-03 03:34:18,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-11-03 03:34:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:34:18,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:18,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:18,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:18,481 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 631651059, now seen corresponding path program 1 times [2022-11-03 03:34:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:18,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444576034] [2022-11-03 03:34:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:18,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:18,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444576034] [2022-11-03 03:34:18,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444576034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:18,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:18,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:34:18,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546066732] [2022-11-03 03:34:18,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:18,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:34:18,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:18,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:34:18,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:34:18,790 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:18,991 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-11-03 03:34:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 03:34:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:18,992 INFO L225 Difference]: With dead ends: 55 [2022-11-03 03:34:18,992 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:34:18,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 03:34:18,993 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:18,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 13 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:18,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:34:18,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-11-03 03:34:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-11-03 03:34:18,996 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 34 [2022-11-03 03:34:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:18,996 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-11-03 03:34:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-11-03 03:34:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 03:34:18,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:18,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-03 03:34:18,997 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:18,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1630475224, now seen corresponding path program 2 times [2022-11-03 03:34:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:18,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786360327] [2022-11-03 03:34:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:19,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:19,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786360327] [2022-11-03 03:34:19,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786360327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:19,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158162371] [2022-11-03 03:34:19,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:34:19,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:19,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:19,138 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:19,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 03:34:19,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:34:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:34:19,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:34:19,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:19,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 03:34:19,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158162371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:19,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2031537150] [2022-11-03 03:34:19,468 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 03:34:19,468 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:19,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:19,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:19,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:19,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:19,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:19,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:19,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:34:19,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:19,773 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:19,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:34:19,820 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:19,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:19,866 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:19,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,099 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:20,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:34:20,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,155 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:20,155 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 557 treesize of output 538 [2022-11-03 03:34:20,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,222 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:20,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:34:20,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,637 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:20,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:34:20,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,670 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:20,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 313 treesize of output 298 [2022-11-03 03:34:20,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:20,708 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:20,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 302 [2022-11-03 03:34:20,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,839 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:20,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-03 03:34:20,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:20,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,000 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:21,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:34:21,044 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:21,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:21,091 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:21,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:21,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,264 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:21,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 319 [2022-11-03 03:34:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,324 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:21,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 312 treesize of output 313 [2022-11-03 03:34:21,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,380 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:21,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 294 [2022-11-03 03:34:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:21,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,623 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:21,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 305 treesize of output 290 [2022-11-03 03:34:21,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,661 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:34:21,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 294 [2022-11-03 03:34:21,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:21,700 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:34:21,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 379 treesize of output 372 [2022-11-03 03:34:21,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:21,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:21,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:21,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:21,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:21,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:22,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:22,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:34:22,642 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:25,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5250#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#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) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_main_~expected~0#1| 3) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |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) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 1) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-03 03:34:25,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:25,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:25,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-03 03:34:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701548353] [2022-11-03 03:34:25,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 03:34:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 03:34:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-11-03 03:34:25,838 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:25,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:25,917 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-11-03 03:34:25,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-03 03:34:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:25,918 INFO L225 Difference]: With dead ends: 46 [2022-11-03 03:34:25,918 INFO L226 Difference]: Without dead ends: 46 [2022-11-03 03:34:25,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:34:25,919 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:25,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:25,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-03 03:34:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-03 03:34:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:25,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-11-03 03:34:25,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 34 [2022-11-03 03:34:25,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:25,922 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-11-03 03:34:25,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:25,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-11-03 03:34:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 03:34:25,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:25,923 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:25,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 03:34:26,133 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1426305195, now seen corresponding path program 1 times [2022-11-03 03:34:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:26,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700175887] [2022-11-03 03:34:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:26,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:26,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700175887] [2022-11-03 03:34:26,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700175887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:26,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:26,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:34:26,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173931701] [2022-11-03 03:34:26,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:26,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:34:26,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:26,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:34:26,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:26,283 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:26,438 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-11-03 03:34:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:34:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-03 03:34:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:26,440 INFO L225 Difference]: With dead ends: 47 [2022-11-03 03:34:26,440 INFO L226 Difference]: Without dead ends: 47 [2022-11-03 03:34:26,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-03 03:34:26,441 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 107 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:26,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 12 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-03 03:34:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-03 03:34:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 46 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) [2022-11-03 03:34:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-11-03 03:34:26,443 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 36 [2022-11-03 03:34:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:26,443 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-11-03 03:34:26,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-11-03 03:34:26,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:34:26,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:26,444 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-03 03:34:26,444 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:26,445 INFO L85 PathProgramCache]: Analyzing trace with hash 946767685, now seen corresponding path program 1 times [2022-11-03 03:34:26,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:26,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755546746] [2022-11-03 03:34:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:34:27,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:27,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755546746] [2022-11-03 03:34:27,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755546746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:27,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143499532] [2022-11-03 03:34:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:27,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:27,674 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:27,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 03:34:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:27,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 03:34:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:28,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:28,592 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:34:28,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 56 [2022-11-03 03:34:28,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:28,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 30 [2022-11-03 03:34:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:28,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 72 treesize of output 59 [2022-11-03 03:34:29,438 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:29,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 56 [2022-11-03 03:34:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 03:34:29,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:40,494 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:40,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-11-03 03:34:40,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 37 [2022-11-03 03:34:40,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-03 03:34:40,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:40,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 59 [2022-11-03 03:34:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:34:41,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143499532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:41,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87325842] [2022-11-03 03:34:41,141 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 03:34:41,141 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:41,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:41,142 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:41,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,198 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:41,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:41,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:41,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:34:41,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,419 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:41,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:34:41,469 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:41,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:41,519 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:41,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:41,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:41,902 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:41,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 989 treesize of output 938 [2022-11-03 03:34:41,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:41,999 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:42,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 986 treesize of output 981 [2022-11-03 03:34:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:42,077 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:42,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 974 treesize of output 969 [2022-11-03 03:34:42,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:42,637 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:42,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 310 treesize of output 303 [2022-11-03 03:34:42,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:42,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:42,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:42,675 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:42,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 350 treesize of output 335 [2022-11-03 03:34:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:42,715 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:42,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 346 treesize of output 339 [2022-11-03 03:34:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:42,868 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:42,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 407 treesize of output 402 [2022-11-03 03:34:43,052 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:43,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:43,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:43,079 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:43,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 273 [2022-11-03 03:34:43,131 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:43,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:43,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:43,459 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:43,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 735 treesize of output 730 [2022-11-03 03:34:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:43,523 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:43,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 723 treesize of output 724 [2022-11-03 03:34:43,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:43,586 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:43,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 704 treesize of output 673 [2022-11-03 03:34:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:44,043 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:44,044 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 321 treesize of output 314 [2022-11-03 03:34:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:44,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:44,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:44,087 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:44,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 367 treesize of output 352 [2022-11-03 03:34:44,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:44,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:44,128 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:44,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 363 treesize of output 356 [2022-11-03 03:34:44,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:44,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:44,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:44,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:44,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:44,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:45,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:45,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:45,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:45,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:34:45,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:45,259 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:34:50,951 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5751#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |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) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |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_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:34:50,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:34:50,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:34:50,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2022-11-03 03:34:50,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655579228] [2022-11-03 03:34:50,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:50,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-03 03:34:50,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-03 03:34:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=4776, Unknown=23, NotChecked=0, Total=5112 [2022-11-03 03:34:50,954 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:52,769 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-11-03 03:34:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-03 03:34:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 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 39 [2022-11-03 03:34:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:52,770 INFO L225 Difference]: With dead ends: 80 [2022-11-03 03:34:52,770 INFO L226 Difference]: Without dead ends: 80 [2022-11-03 03:34:52,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=532, Invalid=8564, Unknown=24, NotChecked=0, Total=9120 [2022-11-03 03:34:52,773 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:52,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-11-03 03:34:52,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-03 03:34:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2022-11-03 03:34:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-03 03:34:52,775 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 39 [2022-11-03 03:34:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:52,776 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-03 03:34:52,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-03 03:34:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:34:52,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:52,777 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:52,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 03:34:52,985 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:34:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 946766459, now seen corresponding path program 1 times [2022-11-03 03:34:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039659894] [2022-11-03 03:34:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:34:54,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:54,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039659894] [2022-11-03 03:34:54,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039659894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:34:54,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287273333] [2022-11-03 03:34:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:54,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:54,085 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:34:54,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:34:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 03:34:54,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:54,324 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 03:34:54,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:54,358 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:54,468 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:54,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2022-11-03 03:34:54,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:54,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 03:34:54,603 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:54,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 03:34:54,660 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:34:54,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-03 03:34:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:34:54,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:55,438 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1))) is different from false [2022-11-03 03:34:55,448 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1873 (Array Int Int)) (v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1873) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1))) is different from false [2022-11-03 03:34:55,465 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1873 (Array Int Int)) (v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_1873) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1))) is different from false [2022-11-03 03:34:55,481 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1873 (Array Int Int)) (v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|) (= (select (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_1873) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1))) is different from false [2022-11-03 03:34:55,491 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1873 (Array Int Int)) (v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (= (select (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_1873) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|))) is different from false [2022-11-03 03:34:55,498 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:55,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 29 [2022-11-03 03:34:55,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 48 treesize of output 44 [2022-11-03 03:34:55,511 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:55,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2022-11-03 03:34:55,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 03:34:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:34:55,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287273333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:55,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109541814] [2022-11-03 03:34:55,747 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:34:55,747 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:55,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:55,748 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:55,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:55,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:55,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:34:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:34:55,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:55,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:55,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:55,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:34:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:55,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:34:56,043 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:56,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:56,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,068 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:56,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 273 [2022-11-03 03:34:56,113 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:56,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,414 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:56,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 576 treesize of output 577 [2022-11-03 03:34:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,476 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:56,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 557 treesize of output 538 [2022-11-03 03:34:56,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,541 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:56,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:34:56,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:56,971 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:56,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 312 treesize of output 305 [2022-11-03 03:34:56,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,008 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:34:57,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,048 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:57,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,184 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:34:57,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 415 treesize of output 410 [2022-11-03 03:34:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,347 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:34:57,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 279 [2022-11-03 03:34:57,391 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:57,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:34:57,437 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:34:57,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:34:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,596 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:57,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 319 [2022-11-03 03:34:57,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:57,648 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:34:57,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 312 treesize of output 313 [2022-11-03 03:34:57,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,698 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:34:57,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 294 [2022-11-03 03:34:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,965 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:34:57,966 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 329 treesize of output 322 [2022-11-03 03:34:57,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:57,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:58,007 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:34:58,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:58,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:58,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:58,039 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:34:58,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 471 treesize of output 456 [2022-11-03 03:34:58,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:58,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:58,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:58,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:58,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:34:58,344 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:34:58,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:58,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:58,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:59,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:34:59,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:34:59,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:03,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6213#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |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) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:03,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:03,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:03,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 15] total 31 [2022-11-03 03:35:03,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838682234] [2022-11-03 03:35:03,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:03,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 03:35:03,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 03:35:03,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1723, Unknown=5, NotChecked=440, Total=2352 [2022-11-03 03:35:03,241 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:04,497 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0)) (.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (= (select .cse1 (select .cse0 4)) 1) (= |c_ULTIMATE.start_node_create_~temp~0#1.offset| 0) (forall ((v_ArrVal_1875 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_109| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_109|) (= (select .cse1 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_109| v_ArrVal_1875) 4)) 1))) (= (select |c_#valid| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) 1))) is different from false [2022-11-03 03:35:04,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:04,839 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-03 03:35:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:35:04,840 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 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 39 [2022-11-03 03:35:04,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:04,841 INFO L225 Difference]: With dead ends: 55 [2022-11-03 03:35:04,841 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:35:04,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=352, Invalid=2972, Unknown=6, NotChecked=702, Total=4032 [2022-11-03 03:35:04,849 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:04,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 44 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 540 Invalid, 0 Unknown, 220 Unchecked, 0.4s Time] [2022-11-03 03:35:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:35:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-11-03 03:35:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-03 03:35:04,852 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 39 [2022-11-03 03:35:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-03 03:35:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:04,853 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-03 03:35:04,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 03:35:04,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:04,854 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:04,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:05,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 03:35:05,069 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:35:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:05,069 INFO L85 PathProgramCache]: Analyzing trace with hash 946766460, now seen corresponding path program 1 times [2022-11-03 03:35:05,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:05,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293750497] [2022-11-03 03:35:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:05,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:35:06,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:06,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293750497] [2022-11-03 03:35:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293750497] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91924975] [2022-11-03 03:35:06,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:06,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:06,344 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:06,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 03:35:06,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:06,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-03 03:35:06,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:06,606 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 03:35:06,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-03 03:35:06,618 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:35:06,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:35:06,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:06,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:06,803 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:35:06,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-03 03:35:06,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-03 03:35:06,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:06,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 [2022-11-03 03:35:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:06,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 03:35:07,044 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:07,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-03 03:35:07,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:07,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 03:35:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:35:07,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:08,776 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1993 Int)) (<= 0 (+ 4 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4)))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ 8 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))))) is different from false [2022-11-03 03:35:08,794 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1989 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1993 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 4))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))) (forall ((v_ArrVal_1989 (Array Int Int)) (v_ArrVal_1988 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ 8 (select (store (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4)) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_1988) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4))))))) is different from false [2022-11-03 03:35:08,831 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (and (forall ((v_ArrVal_1989 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1993 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 4))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))) (forall ((v_ArrVal_1989 (Array Int Int)) (v_ArrVal_1988 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1988) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4)))))))) is different from false [2022-11-03 03:35:08,869 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)))) (and (forall ((v_ArrVal_1989 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1993 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 4))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))) (forall ((v_ArrVal_1989 (Array Int Int)) (v_ArrVal_1988 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1988) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4)))))))) is different from false [2022-11-03 03:35:08,891 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))) (and (forall ((v_ArrVal_1989 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1993 Int)) (<= 0 (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))) (forall ((v_ArrVal_1989 (Array Int Int)) (v_ArrVal_1988 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ (select (store (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1989) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4) 8) (select |c_#length| (select (store (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1988) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4)))))))) is different from false [2022-11-03 03:35:08,907 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 47 treesize of output 48 [2022-11-03 03:35:08,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-03 03:35:08,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 62 [2022-11-03 03:35:08,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 106 [2022-11-03 03:35:08,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2022-11-03 03:35:08,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 173 [2022-11-03 03:35:08,952 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 228 treesize of output 226 [2022-11-03 03:35:08,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:08,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 148 treesize of output 144 [2022-11-03 03:35:09,118 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:09,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2022-11-03 03:35:09,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:09,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-11-03 03:35:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:09,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:09,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 10 [2022-11-03 03:35:18,572 WARN L234 SmtUtils]: Spent 9.27s on a formula simplification. DAG size of input: 27 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:35:18,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-11-03 03:35:18,610 INFO L356 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-03 03:35:18,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 59 [2022-11-03 03:35:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:35:18,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91924975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188585926] [2022-11-03 03:35:18,693 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:35:18,693 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:18,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:18,694 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:18,694 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:18,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:18,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:18,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:18,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:18,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:35:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:35:18,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:18,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:35:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:18,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:35:18,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:35:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:18,998 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:18,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 289 [2022-11-03 03:35:19,050 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:19,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:35:19,101 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:19,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:35:19,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:19,550 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:19,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 842 treesize of output 811 [2022-11-03 03:35:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:19,619 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:19,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 847 treesize of output 842 [2022-11-03 03:35:19,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:19,687 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:19,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,205 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:35:20,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 320 treesize of output 305 [2022-11-03 03:35:20,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,252 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:35:20,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 316 treesize of output 309 [2022-11-03 03:35:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:20,295 INFO L356 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-03 03:35:20,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:20,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,439 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:35:20,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 431 treesize of output 426 [2022-11-03 03:35:20,627 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:20,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 291 treesize of output 298 [2022-11-03 03:35:20,673 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:20,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 292 [2022-11-03 03:35:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:20,733 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:20,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 285 treesize of output 277 [2022-11-03 03:35:21,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,069 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:21,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 573 treesize of output 558 [2022-11-03 03:35:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:21,135 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:21,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 578 treesize of output 579 [2022-11-03 03:35:21,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:21,188 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:21,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 572 treesize of output 573 [2022-11-03 03:35:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,691 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:35:21,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:35:21,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:21,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:21,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,720 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:35:21,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 363 treesize of output 348 [2022-11-03 03:35:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:21,757 INFO L356 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-03 03:35:21,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 359 treesize of output 352 [2022-11-03 03:35:21,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:21,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:21,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:35:22,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:22,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:22,029 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:35:22,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:35:22,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:22,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:22,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:35:22,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:35:22,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:27,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6636#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |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) (or (not (<= (+ 8 |ULTIMATE.start_sll_destroy_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_destroy_~head#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_destroy_~head#1.offset| 4)))) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:27,137 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:27,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:27,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 40 [2022-11-03 03:35:27,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448820761] [2022-11-03 03:35:27,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:27,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-03 03:35:27,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:27,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-03 03:35:27,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=2535, Unknown=5, NotChecked=530, Total=3306 [2022-11-03 03:35:27,140 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:29,475 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (not (= |c_ULTIMATE.start_sll_update_at_~head#1.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (= (select .cse0 4) 0) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|) (forall ((v_ArrVal_1993 Int)) (<= 0 (+ 4 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4)))))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (= |c_ULTIMATE.start_sll_update_at_~head#1.base| (select .cse1 4)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_118| Int)) (or (forall ((v_ArrVal_1991 Int) (v_ArrVal_1993 Int)) (<= (+ 8 (select (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1993) 4)) (select |c_#length| (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_118| v_ArrVal_1991) 4)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_118|))) (<= 8 (select |c_#length| |c_ULTIMATE.start_sll_update_at_~head#1.base|)))) is different from false [2022-11-03 03:35:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:29,952 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-11-03 03:35:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 03:35:29,953 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 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 39 [2022-11-03 03:35:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:29,954 INFO L225 Difference]: With dead ends: 55 [2022-11-03 03:35:29,954 INFO L226 Difference]: Without dead ends: 55 [2022-11-03 03:35:29,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=453, Invalid=3987, Unknown=6, NotChecked=810, Total=5256 [2022-11-03 03:35:29,956 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 319 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:29,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 518 Invalid, 0 Unknown, 319 Unchecked, 0.4s Time] [2022-11-03 03:35:29,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-03 03:35:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-11-03 03:35:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.173913043478261) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-11-03 03:35:29,958 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 39 [2022-11-03 03:35:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:29,959 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-11-03 03:35:29,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-11-03 03:35:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 03:35:29,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:29,960 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:29,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:30,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:30,169 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:35:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash -690472460, now seen corresponding path program 1 times [2022-11-03 03:35:30,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:30,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834707906] [2022-11-03 03:35:30,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:30,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:35:31,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834707906] [2022-11-03 03:35:31,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834707906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254241966] [2022-11-03 03:35:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:31,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:31,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:31,310 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:31,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 03:35:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:31,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-03 03:35:31,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:31,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:35:31,604 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:35:31,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:35:31,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:31,785 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:35:31,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-03 03:35:31,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 [2022-11-03 03:35:31,954 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:31,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-03 03:35:32,003 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:35:32,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:32,723 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2104 Int)) (or (< (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|))) is different from false [2022-11-03 03:35:32,734 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2103 (Array Int Int)) (v_ArrVal_2104 Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2103) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|))) is different from false [2022-11-03 03:35:32,752 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2103 (Array Int Int)) (v_ArrVal_2104 Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2103) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|))) is different from false [2022-11-03 03:35:32,771 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2103 (Array Int Int)) (v_ArrVal_2104 Int)) (or (< (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2103) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|))) is different from false [2022-11-03 03:35:32,790 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2103 (Array Int Int)) (v_ArrVal_2104 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|) (< (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2103) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|))) is different from false [2022-11-03 03:35:32,799 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:32,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 24 [2022-11-03 03:35:32,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-03 03:35:32,814 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:32,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 03:35:32,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-03 03:35:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2022-11-03 03:35:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254241966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741987933] [2022-11-03 03:35:33,114 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-03 03:35:33,114 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:35:33,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:35:33,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:35:33,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:35:33,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:33,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:33,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:33,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:35:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:33,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:35:33,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:35:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:35:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:35:33,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,407 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:33,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 289 [2022-11-03 03:35:33,467 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:33,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:35:33,520 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:33,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:35:33,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,752 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:33,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 315 treesize of output 320 [2022-11-03 03:35:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,810 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:33,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 325 [2022-11-03 03:35:33,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,868 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:33,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 319 [2022-11-03 03:35:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,194 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:35:34,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 346 treesize of output 331 [2022-11-03 03:35:34,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,232 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:35:34,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 342 treesize of output 335 [2022-11-03 03:35:34,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,267 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:35:34,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 438 treesize of output 431 [2022-11-03 03:35:34,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,436 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:35:34,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 493 treesize of output 488 [2022-11-03 03:35:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,677 INFO L356 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-03 03:35:34,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 289 [2022-11-03 03:35:34,722 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:34,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 287 treesize of output 294 [2022-11-03 03:35:34,764 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:35:34,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 281 treesize of output 288 [2022-11-03 03:35:34,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:34,985 INFO L356 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-03 03:35:34,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 315 treesize of output 320 [2022-11-03 03:35:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:35,062 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:35,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 325 [2022-11-03 03:35:35,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:35,123 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:35:35,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 318 treesize of output 319 [2022-11-03 03:35:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:35,407 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 03:35:35,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 301 treesize of output 286 [2022-11-03 03:35:35,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:35,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:35,449 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:35:35,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 297 treesize of output 290 [2022-11-03 03:35:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:35,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:35,490 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 03:35:35,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 309 treesize of output 302 [2022-11-03 03:35:35,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:35:35,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:35,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:35,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:35:35,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:35,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:35:36,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:35:36,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:36,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:36,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:35:36,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:35:36,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:35:40,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7071#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |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) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (not (< |ULTIMATE.start_sll_destroy_~head#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:35:40,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:35:40,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:35:40,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 36 [2022-11-03 03:35:40,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153539776] [2022-11-03 03:35:40,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:40,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 03:35:40,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:35:40,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 03:35:40,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2154, Unknown=5, NotChecked=490, Total=2862 [2022-11-03 03:35:40,984 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:42,123 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|))) (let ((.cse0 (select .cse1 4))) (and (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_127| Int) (v_ArrVal_2104 Int)) (or (< (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_127| v_ArrVal_2104) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_127|))) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (<= (+ .cse0 1) |c_#StackHeapBarrier|)))) is different from false [2022-11-03 03:35:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:42,740 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-11-03 03:35:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:35:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 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 41 [2022-11-03 03:35:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:42,741 INFO L225 Difference]: With dead ends: 56 [2022-11-03 03:35:42,741 INFO L226 Difference]: Without dead ends: 56 [2022-11-03 03:35:42,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=440, Invalid=3610, Unknown=6, NotChecked=774, Total=4830 [2022-11-03 03:35:42,742 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 201 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:42,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 95 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 514 Invalid, 0 Unknown, 386 Unchecked, 0.4s Time] [2022-11-03 03:35:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-03 03:35:42,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-11-03 03:35:42,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:42,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-03 03:35:42,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 41 [2022-11-03 03:35:42,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:42,745 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-03 03:35:42,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.4166666666666665) internal successors, (87), 37 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:35:42,745 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-03 03:35:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:35:42,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:42,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:42,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:42,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:42,949 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:35:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:42,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1266512548, now seen corresponding path program 2 times [2022-11-03 03:35:42,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:42,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233056321] [2022-11-03 03:35:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:42,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:35:44,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:35:44,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233056321] [2022-11-03 03:35:44,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233056321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:35:44,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408559216] [2022-11-03 03:35:44,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:44,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:44,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:44,386 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:44,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 03:35:44,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:44,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:44,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 03:35:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:44,694 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-03 03:35:44,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 44 [2022-11-03 03:35:44,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:35:45,147 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 03:35:45,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 65 [2022-11-03 03:35:45,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:45,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 69 treesize of output 44 [2022-11-03 03:35:45,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 31 [2022-11-03 03:35:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 03:35:45,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:49,517 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|))) is different from false [2022-11-03 03:35:49,531 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2218) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|))) is different from false [2022-11-03 03:35:49,553 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2218) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0)) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|))) is different from false [2022-11-03 03:35:49,576 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_2218) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|))) is different from false [2022-11-03 03:35:49,589 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2218 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|) (= (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (store (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse0) v_ArrVal_2218) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-03 03:35:49,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:49,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 36 [2022-11-03 03:35:49,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 58 [2022-11-03 03:35:49,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:49,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 03:35:49,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:49,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-11-03 03:36:01,826 WARN L234 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 25 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:36:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 9 not checked. [2022-11-03 03:36:15,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408559216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:36:15,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117627455] [2022-11-03 03:36:15,949 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 03:36:15,949 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:36:15,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:36:15,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:36:15,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:36:15,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:15,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:15,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:16,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:36:16,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:16,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 03:36:16,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:36:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-03 03:36:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:16,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:16,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:16,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:36:16,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:16,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-03 03:36:16,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 35 [2022-11-03 03:36:16,277 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:36:16,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:36:16,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,314 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:36:16,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 266 [2022-11-03 03:36:16,369 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:36:16,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:36:16,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:16,741 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:36:16,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 961 treesize of output 910 [2022-11-03 03:36:16,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,827 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:36:16,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 958 treesize of output 953 [2022-11-03 03:36:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:16,904 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:36:16,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 946 treesize of output 941 [2022-11-03 03:36:17,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:17,489 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:36:17,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 293 treesize of output 286 [2022-11-03 03:36:17,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:17,530 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:36:17,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 353 treesize of output 346 [2022-11-03 03:36:17,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:17,563 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:36:17,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 381 treesize of output 366 [2022-11-03 03:36:17,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,694 INFO L356 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-03 03:36:17,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 case distinctions, treesize of input 366 treesize of output 369 [2022-11-03 03:36:17,866 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:36:17,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 291 [2022-11-03 03:36:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:17,908 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:36:17,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 284 treesize of output 266 [2022-11-03 03:36:17,978 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 03:36:17,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 278 treesize of output 285 [2022-11-03 03:36:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:18,205 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:36:18,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 562 treesize of output 563 [2022-11-03 03:36:18,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:18,268 INFO L356 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-03 03:36:18,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 556 treesize of output 557 [2022-11-03 03:36:18,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,333 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 03:36:18,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 537 treesize of output 518 [2022-11-03 03:36:18,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,683 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:36:18,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 314 treesize of output 307 [2022-11-03 03:36:18,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:36:18,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,717 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-03 03:36:18,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:36:18,757 INFO L356 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-03 03:36:18,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:18,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:36:18,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:36:18,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:36:19,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:36:19,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:36:19,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 03:36:19,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:36:19,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:19,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:36:19,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 03:36:19,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:36:19,907 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:36:26,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7539#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |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) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |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_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-03 03:36:26,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:36:26,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:36:26,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 17] total 44 [2022-11-03 03:36:26,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621702486] [2022-11-03 03:36:26,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:36:26,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-03 03:36:26,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:36:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-03 03:36:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=3212, Unknown=8, NotChecked=590, Total=4032 [2022-11-03 03:36:26,522 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:09,362 WARN L234 SmtUtils]: Spent 41.63s on a formula simplification. DAG size of input: 71 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:30,805 WARN L234 SmtUtils]: Spent 21.35s on a formula simplification. DAG size of input: 45 DAG size of output: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:37:32,253 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse2 (select .cse1 .cse3))) (let ((.cse0 (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0)) (.cse4 (select |c_#valid| .cse2))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_main_~s~0#1.base|) 0) (= (store .cse0 (select .cse1 4) 0) |c_ULTIMATE.start_main_old_#valid#1|) (= (select |c_ULTIMATE.start_main_old_#valid#1| .cse2) 0) (= |c_ULTIMATE.start_main_~s~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~s~0#1.base| .cse2)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_136| Int) (v_ArrVal_2219 Int)) (or (= (store .cse0 (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_136| v_ArrVal_2219) .cse3) 0) |c_ULTIMATE.start_main_old_#valid#1|) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_136|))) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| .cse2 .cse4) |c_ULTIMATE.start_main_~s~0#1.base| (select |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base|))) (= .cse4 1))))) is different from false [2022-11-03 03:37:33,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:37:33,637 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-11-03 03:37:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 03:37:33,638 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 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 44 [2022-11-03 03:37:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:37:33,638 INFO L225 Difference]: With dead ends: 91 [2022-11-03 03:37:33,639 INFO L226 Difference]: Without dead ends: 90 [2022-11-03 03:37:33,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 103.7s TimeCoverageRelationStatistics Valid=383, Invalid=4888, Unknown=9, NotChecked=882, Total=6162 [2022-11-03 03:37:33,640 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:37:33,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 202 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 559 Invalid, 0 Unknown, 587 Unchecked, 0.7s Time] [2022-11-03 03:37:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-03 03:37:33,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-11-03 03:37:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 87 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) [2022-11-03 03:37:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-11-03 03:37:33,644 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 44 [2022-11-03 03:37:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:37:33,644 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-11-03 03:37:33,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:37:33,645 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-11-03 03:37:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:37:33,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:37:33,646 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:37:33,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 03:37:33,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:33,861 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-03 03:37:33,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:37:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1266513774, now seen corresponding path program 2 times [2022-11-03 03:37:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:37:33,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793162418] [2022-11-03 03:37:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:37:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:37:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:37:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-03 03:37:36,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:37:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793162418] [2022-11-03 03:37:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793162418] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:37:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740972351] [2022-11-03 03:37:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:37:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:37:36,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:37:36,169 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:37:36,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4161f474-8cf3-4f2d-96ad-4b3656f925f1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 03:37:36,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:37:36,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:37:36,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-03 03:37:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:37:36,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:37:36,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:37:36,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 03:37:36,566 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 03:37:36,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-03 03:37:36,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:37:36,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:37:36,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:37:36,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-11-03 03:37:36,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-03 03:37:36,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-03 03:37:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:37,185 INFO L356 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-03 03:37:37,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 52 [2022-11-03 03:37:37,202 INFO L356 Elim1Store]: treesize reduction 23, result has 36.1 percent of original size [2022-11-03 03:37:37,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2022-11-03 03:37:37,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:37:37,355 INFO L356 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2022-11-03 03:37:37,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 41 [2022-11-03 03:37:37,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2022-11-03 03:37:37,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 03:37:37,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 03:37:38,089 INFO L356 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-11-03 03:37:38,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 78 treesize of output 43 [2022-11-03 03:37:38,107 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:37:38,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-03 03:37:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-03 03:37:38,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:37:38,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-03 03:37:51,470 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int)) (or (forall ((v_ArrVal_2350 Int)) (let ((.cse0 (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350))) (let ((.cse1 (select .cse0 .cse2))) (or (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) .cse1) 4) 0) (= .cse1 |c_ULTIMATE.start_main_~s~0#1.base|))))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int)) (or (forall ((v_ArrVal_2350 Int)) (let ((.cse4 (select (store .cse3 |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350) .cse2))) (or (forall ((v_ArrVal_2349 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2349) .cse4) 4) 0)) (= .cse4 |c_ULTIMATE.start_main_~s~0#1.base|)))) (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|))))) is different from false [2022-11-03 03:38:22,373 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:38:24,501 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|) .cse4)) (.cse6 (select |c_#memory_$Pointer$.base| .cse5))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int)) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|) (forall ((v_ArrVal_2350 Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345)))) (let ((.cse2 (store (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350))) (let ((.cse3 (select .cse2 .cse4))) (or (= (select (select (store .cse1 |c_ULTIMATE.start_main_~s~0#1.base| .cse2) .cse3) 4) 0) (= .cse3 |c_ULTIMATE.start_main_~s~0#1.base|)))))))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int)) (or (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| .cse0)) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int) (v_ArrVal_2347 Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|) (forall ((v_ArrVal_2350 Int)) (let ((.cse7 (select (store (select (store |c_#memory_$Pointer$.base| .cse5 (store .cse6 |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345)) |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350) .cse4))) (or (forall ((v_ArrVal_2349 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse5 (store (select |c_#memory_$Pointer$.offset| .cse5) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2347)) |c_ULTIMATE.start_main_~s~0#1.base| v_ArrVal_2349) .cse7) 4) 0)) (= .cse7 |c_ULTIMATE.start_main_~s~0#1.base|)))))))))))) is different from false [2022-11-03 03:38:26,556 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (let ((.cse5 (select |c_#memory_$Pointer$.base| .cse4)) (.cse6 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse3))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int)) (or (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|) (forall ((v_ArrVal_2350 Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345)))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350))) (let ((.cse2 (select .cse1 .cse3))) (or (= (select (select (store .cse0 |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse2) 4) 0) (= .cse2 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))))) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| .cse6)))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int)) (or (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int) (v_ArrVal_2347 Int)) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|) (forall ((v_ArrVal_2350 Int)) (let ((.cse7 (select (store (select (store |c_#memory_$Pointer$.base| .cse4 (store .cse5 |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350) .cse3))) (or (forall ((v_ArrVal_2349 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.offset| .cse4 (store (select |c_#memory_$Pointer$.offset| .cse4) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2347)) |c_ULTIMATE.start_sll_create_~head~0#1.base| v_ArrVal_2349) .cse7) 4) 0)) (= .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))))) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| .cse6)))))))) is different from false [2022-11-03 03:38:28,682 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|))) (and (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int) (v_ArrVal_2350 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int)) (let ((.cse3 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store .cse5 .cse3 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350))) (let ((.cse2 (select .cse1 .cse3))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_146|) (= (select (select (store .cse0 |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse1) .cse2) 4) 0) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse2) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|))))))) (forall ((v_ArrVal_2341 Int)) (or (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int)) (or (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int) (v_ArrVal_2347 Int)) (or (forall ((v_ArrVal_2350 Int)) (let ((.cse7 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse8 (select (store (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store .cse5 .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (store .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350) .cse7))) (or (forall ((v_ArrVal_2349 (Array Int Int))) (= (select (select (store (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse7 v_ArrVal_2341)))) (store .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2347))) |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_ArrVal_2349) .cse8) 4) 0)) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| .cse8))))) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|))) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2341)))) (not (<= v_ArrVal_2341 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)))))) is different from false [2022-11-03 03:38:28,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:28,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 133 treesize of output 101 [2022-11-03 03:38:28,781 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:28,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 67 treesize of output 66 [2022-11-03 03:38:28,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:28,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 94 treesize of output 82 [2022-11-03 03:38:28,850 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int) (v_ArrVal_2350 Int) (v_arrayElimArr_15 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_ArrVal_2345 Int)) (let ((.cse0 (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_15))) (store .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345))))) (let ((.cse1 (store (select .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350)) (.cse3 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse2 (select .cse1 .cse3))) (or (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_146|) (= (select (select (store .cse0 |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse1) .cse2) 4) 0) (not (= |c_ULTIMATE.start_sll_create_~head~0#1.base| (select v_arrayElimArr_15 .cse3))) (= |c_ULTIMATE.start_node_create_~temp~0#1.base| .cse2) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|)))))) (forall ((|ULTIMATE.start_sll_create_~new_head~0#1.offset| Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_146| Int) (v_ArrVal_2350 Int) (v_ArrVal_2349 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_145| Int) (v_arrayElimArr_17 (Array Int Int)) (v_arrayElimArr_16 (Array Int Int)) (v_ArrVal_2345 Int) (v_ArrVal_2347 Int)) (let ((.cse8 (+ 4 |ULTIMATE.start_sll_create_~new_head~0#1.offset|))) (let ((.cse5 (select (store (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_17))) (store .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse9 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2345))) |c_ULTIMATE.start_node_create_~temp~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_145| v_ArrVal_2350) .cse8)) (.cse6 (select v_arrayElimArr_16 .cse8))) (or (= .cse5 |c_ULTIMATE.start_node_create_~temp~0#1.base|) (not (<= |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| .cse6)) (= (select (select (store (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_~temp~0#1.base| v_arrayElimArr_16))) (store .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base| (store (select .cse7 |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_146| v_ArrVal_2347))) |c_ULTIMATE.start_node_create_~temp~0#1.base| v_ArrVal_2349) .cse5) 4) 0) (not (= (select v_arrayElimArr_17 .cse8) |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (not (<= .cse6 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (< |ULTIMATE.start_sll_create_~new_head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_145|)))))) is different from false [2022-11-03 03:38:29,562 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:29,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 361 treesize of output 252 [2022-11-03 03:38:29,581 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:29,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 232 [2022-11-03 03:38:29,734 INFO L356 Elim1Store]: treesize reduction 33, result has 67.0 percent of original size [2022-11-03 03:38:29,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 4411 treesize of output 4235 [2022-11-03 03:38:29,989 INFO L356 Elim1Store]: treesize reduction 43, result has 66.9 percent of original size [2022-11-03 03:38:29,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 16667 treesize of output 16131 [2022-11-03 03:38:30,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:30,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16316 treesize of output 16169 [2022-11-03 03:38:30,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16160 treesize of output 15792 [2022-11-03 03:38:30,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51048 treesize of output 47720 [2022-11-03 03:38:31,413 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:38:31,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 58106 treesize of output 56902