./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS --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 a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba --- 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-8393723 [2022-11-19 06:43:13,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:43:13,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:43:13,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:43:13,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:43:13,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:43:13,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:43:13,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:43:13,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:43:13,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:43:13,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:43:13,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:43:13,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:43:13,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:43:13,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:43:13,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:43:13,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:43:13,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:43:13,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:43:13,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:43:13,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:43:13,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:43:13,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:43:13,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:43:13,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:43:13,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:43:13,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:43:13,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:43:13,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:43:13,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:43:13,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:43:13,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:43:13,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:43:13,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:43:13,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:43:13,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:43:13,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:43:13,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:43:13,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:43:13,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:43:13,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:43:13,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:43:13,482 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:43:13,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:43:13,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:43:13,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:43:13,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:43:13,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:43:13,485 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:43:13,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:43:13,486 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:43:13,486 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:43:13,487 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:43:13,487 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:43:13,488 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:43:13,488 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:43:13,488 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:43:13,488 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:43:13,488 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:43:13,489 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:43:13,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:43:13,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:43:13,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:43:13,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:43:13,492 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:43:13,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:43:13,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:43:13,492 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:43:13,492 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:43:13,493 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:43:13,493 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:43:13,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:43:13,493 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:43:13,494 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:43:13,494 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:43:13,495 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:43:13,495 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:43:13,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:13,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:43:13,496 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:43:13,496 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:43:13,496 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:43:13,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:43:13,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:43:13,497 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_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7651578256dc791e0a036690d99e12094845a58f582fb99f9abee48c7c5dfba [2022-11-19 06:43:13,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:43:13,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:43:13,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:43:13,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:43:13,799 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:43:13,800 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-11-19 06:43:13,873 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/data/3cfad51ce/822ddf54b19c41a5b34913419447d138/FLAG1e8b39c32 [2022-11-19 06:43:14,441 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:43:14,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i [2022-11-19 06:43:14,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/data/3cfad51ce/822ddf54b19c41a5b34913419447d138/FLAG1e8b39c32 [2022-11-19 06:43:14,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/data/3cfad51ce/822ddf54b19c41a5b34913419447d138 [2022-11-19 06:43:14,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:43:14,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:43:14,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:14,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:43:14,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:43:14,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:14" (1/1) ... [2022-11-19 06:43:14,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bff7c32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:14, skipping insertion in model container [2022-11-19 06:43:14,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:43:14" (1/1) ... [2022-11-19 06:43:14,765 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:43:14,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:43:15,171 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-11-19 06:43:15,177 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-11-19 06:43:15,183 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-11-19 06:43:15,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:15,195 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:43:15,226 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22251,22264] [2022-11-19 06:43:15,228 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22336,22349] [2022-11-19 06:43:15,232 WARN L234 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_39956e90-b103-4e3c-9468-4dbde3e88a60/sv-benchmarks/c/forester-heap/sll-reverse_simple.i[22829,22842] [2022-11-19 06:43:15,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:43:15,266 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:43:15,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15 WrapperNode [2022-11-19 06:43:15,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:43:15,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:15,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:43:15,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:43:15,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,287 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,306 INFO L138 Inliner]: procedures = 119, calls = 35, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 139 [2022-11-19 06:43:15,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:43:15,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:43:15,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:43:15,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:43:15,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,372 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:43:15,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:43:15,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:43:15,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:43:15,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (1/1) ... [2022-11-19 06:43:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:43:15,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:15,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:43:15,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:43:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:43:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:43:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:43:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:43:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:43:15,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:43:15,648 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:43:15,650 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:43:16,150 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:43:16,235 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:43:16,235 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-19 06:43:16,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:16 BoogieIcfgContainer [2022-11-19 06:43:16,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:43:16,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:43:16,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:43:16,244 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:43:16,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:43:14" (1/3) ... [2022-11-19 06:43:16,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d6fd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:16, skipping insertion in model container [2022-11-19 06:43:16,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:43:15" (2/3) ... [2022-11-19 06:43:16,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50d6fd92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:43:16, skipping insertion in model container [2022-11-19 06:43:16,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:43:16" (3/3) ... [2022-11-19 06:43:16,249 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-reverse_simple.i [2022-11-19 06:43:16,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:43:16,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-19 06:43:16,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:43:16,384 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;@67a0b72f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:43:16,385 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-19 06:43:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 50 states have (on average 2.52) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:43:16,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:16,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:43:16,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:16,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:16,419 INFO L85 PathProgramCache]: Analyzing trace with hash 8622, now seen corresponding path program 1 times [2022-11-19 06:43:16,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:16,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751141761] [2022-11-19 06:43:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:16,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751141761] [2022-11-19 06:43:16,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751141761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:16,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:16,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:43:16,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296558976] [2022-11-19 06:43:16,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:16,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:43:16,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:16,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:43:16,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:16,727 INFO L87 Difference]: Start difference. First operand has 108 states, 50 states have (on average 2.52) internal successors, (126), 107 states have internal predecessors, (126), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:16,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:16,916 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2022-11-19 06:43:16,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:43:16,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 06:43:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:16,930 INFO L225 Difference]: With dead ends: 106 [2022-11-19 06:43:16,931 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 06:43:16,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:16,937 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 68 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:16,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 81 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 06:43:16,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-19 06:43:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 50 states have (on average 2.24) internal successors, (112), 104 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2022-11-19 06:43:16,977 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 2 [2022-11-19 06:43:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:16,978 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2022-11-19 06:43:16,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2022-11-19 06:43:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 06:43:16,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:16,979 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 06:43:16,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:43:16,980 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:16,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 8623, now seen corresponding path program 1 times [2022-11-19 06:43:16,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029783004] [2022-11-19 06:43:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:16,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:17,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:17,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029783004] [2022-11-19 06:43:17,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029783004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:17,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:17,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:43:17,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442960599] [2022-11-19 06:43:17,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:17,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:43:17,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:17,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:43:17,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:17,105 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:17,240 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2022-11-19 06:43:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:43:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-19 06:43:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:17,242 INFO L225 Difference]: With dead ends: 103 [2022-11-19 06:43:17,242 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 06:43:17,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:17,244 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 66 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:17,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 80 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:17,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 06:43:17,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-19 06:43:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 50 states have (on average 2.2) internal successors, (110), 102 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) [2022-11-19 06:43:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-11-19 06:43:17,253 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 2 [2022-11-19 06:43:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:17,254 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-11-19 06:43:17,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-11-19 06:43:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:43:17,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:17,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:43:17,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:43:17,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:17,256 INFO L85 PathProgramCache]: Analyzing trace with hash -620679073, now seen corresponding path program 1 times [2022-11-19 06:43:17,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:17,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463077929] [2022-11-19 06:43:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:17,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:17,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:17,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463077929] [2022-11-19 06:43:17,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463077929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:17,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:17,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:43:17,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960817351] [2022-11-19 06:43:17,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:17,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:43:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:17,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:43:17,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:17,503 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-19 06:43:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:17,710 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-11-19 06:43:17,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:17,711 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-11-19 06:43:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:17,720 INFO L225 Difference]: With dead ends: 96 [2022-11-19 06:43:17,720 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 06:43:17,723 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 [2022-11-19 06:43:17,725 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 114 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:17,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 53 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 06:43:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2022-11-19 06:43:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 92 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2022-11-19 06:43:17,745 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 6 [2022-11-19 06:43:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:17,745 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2022-11-19 06:43:17,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-11-19 06:43:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2022-11-19 06:43:17,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:43:17,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:17,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:43:17,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:43:17,748 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash -620679072, now seen corresponding path program 1 times [2022-11-19 06:43:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:17,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106075731] [2022-11-19 06:43:17,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:17,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:17,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:17,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106075731] [2022-11-19 06:43:17,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106075731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:17,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:17,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:17,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076626289] [2022-11-19 06:43:17,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:17,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:43:17,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:43:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:17,967 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-19 06:43:18,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:18,233 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2022-11-19 06:43:18,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:43:18,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 [2022-11-19 06:43:18,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:18,235 INFO L225 Difference]: With dead ends: 119 [2022-11-19 06:43:18,235 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 06:43:18,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:18,236 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 132 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:18,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 87 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:18,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 06:43:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2022-11-19 06:43:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 71 states have (on average 1.7464788732394365) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2022-11-19 06:43:18,244 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 6 [2022-11-19 06:43:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:18,245 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2022-11-19 06:43:18,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-19 06:43:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2022-11-19 06:43:18,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:43:18,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:18,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:18,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:43:18,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:18,247 INFO L85 PathProgramCache]: Analyzing trace with hash 528099814, now seen corresponding path program 1 times [2022-11-19 06:43:18,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152910483] [2022-11-19 06:43:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:18,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:18,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152910483] [2022-11-19 06:43:18,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152910483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:18,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:18,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:18,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605309989] [2022-11-19 06:43:18,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:18,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:18,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:18,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:18,437 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:18,637 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2022-11-19 06:43:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-19 06:43:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:18,639 INFO L225 Difference]: With dead ends: 110 [2022-11-19 06:43:18,639 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 06:43:18,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:18,640 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 55 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:18,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 104 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 06:43:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-11-19 06:43:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.732394366197183) internal successors, (123), 108 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2022-11-19 06:43:18,646 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 8 [2022-11-19 06:43:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:18,647 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2022-11-19 06:43:18,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2022-11-19 06:43:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:43:18,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:18,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:18,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:43:18,648 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:18,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:18,649 INFO L85 PathProgramCache]: Analyzing trace with hash 528099815, now seen corresponding path program 1 times [2022-11-19 06:43:18,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:18,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716189130] [2022-11-19 06:43:18,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:18,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:18,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:18,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:18,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:18,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716189130] [2022-11-19 06:43:18,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716189130] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:18,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:18,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:18,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677578650] [2022-11-19 06:43:18,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:18,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:18,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:18,852 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:19,069 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-11-19 06:43:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:43:19,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2022-11-19 06:43:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:19,071 INFO L225 Difference]: With dead ends: 106 [2022-11-19 06:43:19,071 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 06:43:19,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:19,076 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 171 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:43:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 06:43:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-11-19 06:43:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 100 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 114 transitions. [2022-11-19 06:43:19,091 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 114 transitions. Word has length 8 [2022-11-19 06:43:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:19,092 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 114 transitions. [2022-11-19 06:43:19,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 114 transitions. [2022-11-19 06:43:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:43:19,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:19,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:19,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:43:19,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:19,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 437582719, now seen corresponding path program 1 times [2022-11-19 06:43:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:19,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792806260] [2022-11-19 06:43:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:19,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792806260] [2022-11-19 06:43:19,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792806260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:19,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:19,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:43:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609114637] [2022-11-19 06:43:19,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:19,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:43:19,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:43:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:43:19,163 INFO L87 Difference]: Start difference. First operand 101 states and 114 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:19,276 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2022-11-19 06:43:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:43:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 06:43:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:19,278 INFO L225 Difference]: With dead ends: 110 [2022-11-19 06:43:19,278 INFO L226 Difference]: Without dead ends: 110 [2022-11-19 06:43:19,279 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 [2022-11-19 06:43:19,282 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 94 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:19,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 118 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-19 06:43:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-11-19 06:43:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.6567164179104477) internal successors, (111), 100 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-11-19 06:43:19,292 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 10 [2022-11-19 06:43:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:19,292 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-11-19 06:43:19,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-11-19 06:43:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:43:19,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:19,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:19,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 06:43:19,294 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:19,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -388559402, now seen corresponding path program 1 times [2022-11-19 06:43:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:19,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416137521] [2022-11-19 06:43:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:19,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:19,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416137521] [2022-11-19 06:43:19,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416137521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:19,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:19,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:19,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242319945] [2022-11-19 06:43:19,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:19,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:19,576 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 5 states, 5 states have (on average 2.4) 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) [2022-11-19 06:43:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:19,750 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-11-19 06:43:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) 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 12 [2022-11-19 06:43:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:19,752 INFO L225 Difference]: With dead ends: 118 [2022-11-19 06:43:19,752 INFO L226 Difference]: Without dead ends: 118 [2022-11-19 06:43:19,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:19,753 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 23 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:19,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 207 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-19 06:43:19,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-11-19 06:43:19,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 72 states have (on average 1.625) internal successors, (117), 105 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-11-19 06:43:19,757 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 12 [2022-11-19 06:43:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:19,757 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-11-19 06:43:19,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) 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) [2022-11-19 06:43:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-11-19 06:43:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:43:19,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:19,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:43:19,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 548767546, now seen corresponding path program 1 times [2022-11-19 06:43:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52880008] [2022-11-19 06:43:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:19,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52880008] [2022-11-19 06:43:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52880008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917476560] [2022-11-19 06:43:20,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:20,073 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,237 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2022-11-19 06:43:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:20,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 06:43:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,238 INFO L225 Difference]: With dead ends: 114 [2022-11-19 06:43:20,238 INFO L226 Difference]: Without dead ends: 114 [2022-11-19 06:43:20,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:20,239 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 15 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 206 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-19 06:43:20,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2022-11-19 06:43:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 77 states have (on average 1.5844155844155845) internal successors, (122), 110 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2022-11-19 06:43:20,243 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 15 [2022-11-19 06:43:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,243 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2022-11-19 06:43:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2022-11-19 06:43:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:43:20,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:43:20,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash -168421225, now seen corresponding path program 1 times [2022-11-19 06:43:20,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382259334] [2022-11-19 06:43:20,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382259334] [2022-11-19 06:43:20,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382259334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:20,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775633019] [2022-11-19 06:43:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:20,360 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-11-19 06:43:20,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,540 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-11-19 06:43:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 06:43:20,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,541 INFO L225 Difference]: With dead ends: 111 [2022-11-19 06:43:20,541 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 06:43:20,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:20,542 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:20,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 06:43:20,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-19 06:43:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 77 states have (on average 1.5714285714285714) internal successors, (121), 109 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-11-19 06:43:20,545 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 16 [2022-11-19 06:43:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,546 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-11-19 06:43:20,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-11-19 06:43:20,546 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-11-19 06:43:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:43:20,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 06:43:20,547 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:20,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -168421224, now seen corresponding path program 1 times [2022-11-19 06:43:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613318137] [2022-11-19 06:43:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:20,762 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:20,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613318137] [2022-11-19 06:43:20,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613318137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:20,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:20,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:43:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212601746] [2022-11-19 06:43:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:20,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:20,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:20,764 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-11-19 06:43:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:20,921 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-11-19 06:43:20,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:43:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 06:43:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:20,922 INFO L225 Difference]: With dead ends: 109 [2022-11-19 06:43:20,923 INFO L226 Difference]: Without dead ends: 109 [2022-11-19 06:43:20,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:20,923 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:20,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 157 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-19 06:43:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-11-19 06:43:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-11-19 06:43:20,926 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 16 [2022-11-19 06:43:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:20,927 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-11-19 06:43:20,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-11-19 06:43:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-11-19 06:43:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:43:20,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:20,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:20,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 06:43:20,928 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:20,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1668589069, now seen corresponding path program 1 times [2022-11-19 06:43:20,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:20,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693620718] [2022-11-19 06:43:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:20,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:21,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:21,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693620718] [2022-11-19 06:43:21,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693620718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:21,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884104349] [2022-11-19 06:43:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:21,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:21,287 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:21,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:43:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:21,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:43:21,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:21,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:21,606 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:43:21,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:43:21,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:21,784 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:21,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:43:21,842 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:21,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 06:43:22,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:22,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:43:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:22,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:26,531 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:26,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:43:26,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:26,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:43:26,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:43:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:31,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884104349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:31,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1974868534] [2022-11-19 06:43:31,220 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:43:31,221 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:31,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:31,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:31,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:43:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:43:31,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:31,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:31,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:43:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:43:31,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:31,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:43:31,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:31,586 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:31,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:31,614 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:43:31,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:43:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:43:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 21 [2022-11-19 06:43:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 21 [2022-11-19 06:43:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 06:43:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:43:31,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:31,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:31,905 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 06:43:31,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 348 treesize of output 331 [2022-11-19 06:43:31,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:31,955 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 06:43:31,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 344 treesize of output 338 [2022-11-19 06:43:31,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:32,019 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-19 06:43:32,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 355 [2022-11-19 06:43:32,463 INFO L321 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-19 06:43:32,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 513 treesize of output 386 [2022-11-19 06:43:32,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:32,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:32,580 INFO L321 Elim1Store]: treesize reduction 212, result has 16.2 percent of original size [2022-11-19 06:43:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 445 treesize of output 428 [2022-11-19 06:43:32,644 INFO L321 Elim1Store]: treesize reduction 68, result has 28.4 percent of original size [2022-11-19 06:43:32,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 464 treesize of output 441 [2022-11-19 06:43:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,231 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-19 06:43:33,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1668 treesize of output 1265 [2022-11-19 06:43:33,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,329 INFO L321 Elim1Store]: treesize reduction 91, result has 10.8 percent of original size [2022-11-19 06:43:33,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 1668 treesize of output 1505 [2022-11-19 06:43:33,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:33,500 INFO L321 Elim1Store]: treesize reduction 132, result has 21.0 percent of original size [2022-11-19 06:43:33,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1655 treesize of output 1545 [2022-11-19 06:43:34,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:34,294 INFO L321 Elim1Store]: treesize reduction 310, result has 11.9 percent of original size [2022-11-19 06:43:34,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 1612 treesize of output 1501 [2022-11-19 06:43:34,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:34,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:34,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:34,630 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:34,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:34,667 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:34,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:34,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:34,729 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:34,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 58 [2022-11-19 06:43:34,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:34,769 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:34,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 58 [2022-11-19 06:43:34,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:34,831 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:43:34,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:43:34,864 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:43:34,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:43:34,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:34,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:34,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:34,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:34,946 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:34,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:34,974 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:34,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:35,056 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:35,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 61 [2022-11-19 06:43:35,097 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:35,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 61 [2022-11-19 06:43:35,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:35,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:36,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2674#(and (not (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (or (exists ((|v_ULTIMATE.start_main_~x~0#1.base_154| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_132| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1.offset_132|) (= |ULTIMATE.start_main_~x~0#1.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_154|) |v_ULTIMATE.start_main_~x~0#1.offset_132|)) (= (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_154|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_154|) |v_ULTIMATE.start_main_~x~0#1.offset_132|) |ULTIMATE.start_main_~x~0#1.offset|) (<= (+ 4 |v_ULTIMATE.start_main_~x~0#1.offset_132|) (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_154|)))) (and (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|))) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 06:43:36,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:36,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:36,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-19 06:43:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242899900] [2022-11-19 06:43:36,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:43:36,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:43:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1103, Unknown=4, NotChecked=0, Total=1260 [2022-11-19 06:43:36,377 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 26 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) [2022-11-19 06:43:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:37,179 INFO L93 Difference]: Finished difference Result 209 states and 227 transitions. [2022-11-19 06:43:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:43:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 26 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) Word has length 18 [2022-11-19 06:43:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:37,181 INFO L225 Difference]: With dead ends: 209 [2022-11-19 06:43:37,181 INFO L226 Difference]: Without dead ends: 209 [2022-11-19 06:43:37,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=225, Invalid=1493, Unknown=4, NotChecked=0, Total=1722 [2022-11-19 06:43:37,183 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 602 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:37,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 340 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 451 Invalid, 0 Unknown, 639 Unchecked, 0.5s Time] [2022-11-19 06:43:37,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-19 06:43:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 121. [2022-11-19 06:43:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 90 states have (on average 1.5) internal successors, (135), 120 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 135 transitions. [2022-11-19 06:43:37,186 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 135 transitions. Word has length 18 [2022-11-19 06:43:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:37,186 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 135 transitions. [2022-11-19 06:43:37,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 26 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) [2022-11-19 06:43:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 135 transitions. [2022-11-19 06:43:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:43:37,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:37,187 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:37,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:37,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 06:43:37,393 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:37,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1668589070, now seen corresponding path program 1 times [2022-11-19 06:43:37,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:37,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169808221] [2022-11-19 06:43:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:37,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:37,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:37,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169808221] [2022-11-19 06:43:37,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169808221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:37,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391827393] [2022-11-19 06:43:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:37,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:37,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:37,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:43:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-19 06:43:37,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:37,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:38,056 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:43:38,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:43:38,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:38,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:38,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:38,230 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:38,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:43:38,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:38,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:43:38,267 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:38,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 06:43:38,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 06:43:38,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:38,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:43:38,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:38,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:43:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:38,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:39,178 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:39,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:43:39,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:39,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-19 06:43:39,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 06:43:39,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:39,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-19 06:43:39,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:39,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 06:43:39,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:39,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-19 06:43:39,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:39,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 06:43:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:39,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391827393] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:39,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212666077] [2022-11-19 06:43:39,642 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 06:43:39,642 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:39,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:39,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:39,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:43:39,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:39,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:43:39,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:39,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:43:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:39,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:43:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:43:39,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:39,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:39,879 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:39,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:43:39,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:39,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:43:39,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 06:43:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 21 [2022-11-19 06:43:39,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:39,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 34 treesize of output 21 [2022-11-19 06:43:40,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:43:40,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,123 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 06:43:40,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 341 treesize of output 324 [2022-11-19 06:43:40,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,177 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-19 06:43:40,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 340 [2022-11-19 06:43:40,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,219 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 06:43:40,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 365 treesize of output 359 [2022-11-19 06:43:40,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,532 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-19 06:43:40,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 453 treesize of output 350 [2022-11-19 06:43:40,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,595 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-19 06:43:40,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 405 treesize of output 399 [2022-11-19 06:43:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:40,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:40,706 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-19 06:43:40,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 393 treesize of output 376 [2022-11-19 06:43:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:41,145 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:43:41,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 1492 treesize of output 1149 [2022-11-19 06:43:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:41,253 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-19 06:43:41,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 1479 treesize of output 1387 [2022-11-19 06:43:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:41,304 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:43:41,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1460 treesize of output 1390 [2022-11-19 06:43:41,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:41,952 INFO L321 Elim1Store]: treesize reduction 278, result has 12.0 percent of original size [2022-11-19 06:43:41,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 1454 treesize of output 1379 [2022-11-19 06:43:42,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:42,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:42,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:42,223 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:42,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:42,256 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:42,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:42,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:42,328 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:42,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-19 06:43:42,371 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:42,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-19 06:43:42,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:42,427 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:43:42,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-19 06:43:42,456 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:43:42,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:43:42,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:42,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:42,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:42,508 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:42,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:42,545 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:42,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:42,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:42,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:42,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:42,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:42,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:43,074 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:44,154 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3162#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (or (not (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~x~0#1.offset|))) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 06:43:44,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:44,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:44,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-19 06:43:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512451168] [2022-11-19 06:43:44,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:43:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:43:44,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1334, Unknown=2, NotChecked=0, Total=1482 [2022-11-19 06:43:44,156 INFO L87 Difference]: Start difference. First operand 121 states and 135 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 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) [2022-11-19 06:43:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:46,320 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2022-11-19 06:43:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 06:43:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 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) Word has length 18 [2022-11-19 06:43:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:46,321 INFO L225 Difference]: With dead ends: 189 [2022-11-19 06:43:46,321 INFO L226 Difference]: Without dead ends: 189 [2022-11-19 06:43:46,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=388, Invalid=2580, Unknown=2, NotChecked=0, Total=2970 [2022-11-19 06:43:46,323 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 653 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:46,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 511 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 932 Invalid, 0 Unknown, 369 Unchecked, 1.0s Time] [2022-11-19 06:43:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-19 06:43:46,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 119. [2022-11-19 06:43:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.4731182795698925) internal successors, (137), 118 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2022-11-19 06:43:46,326 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 18 [2022-11-19 06:43:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:46,327 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2022-11-19 06:43:46,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 28 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) [2022-11-19 06:43:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2022-11-19 06:43:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:43:46,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:46,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:46,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:46,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:43:46,534 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:46,534 INFO L85 PathProgramCache]: Analyzing trace with hash 170520483, now seen corresponding path program 1 times [2022-11-19 06:43:46,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:46,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534204378] [2022-11-19 06:43:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:46,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:46,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:46,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534204378] [2022-11-19 06:43:46,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534204378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:46,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572704264] [2022-11-19 06:43:46,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:46,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:46,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:43:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 06:43:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:47,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:43:47,130 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:43:47,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:43:47,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:47,280 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:47,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:43:47,317 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:43:47,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 06:43:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:47,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-19 06:43:47,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:47,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:43:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:47,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:43:47,857 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:47,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:43:47,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:43:47,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:43:47,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:43:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:52,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572704264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:43:52,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954126056] [2022-11-19 06:43:52,375 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:43:52,375 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:43:52,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:43:52,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:43:52,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:43:52,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:43:52,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:52,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:43:52,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:43:52,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:52,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:52,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:43:52,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:43:52,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:43:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,591 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 06:43:52,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-19 06:43:52,619 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:52,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:52,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:52,644 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:43:52,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:43:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,675 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 06:43:52,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:43:52,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-19 06:43:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 41 treesize of output 24 [2022-11-19 06:43:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:52,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:43:52,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:52,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:52,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:52,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:52,933 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:43:52,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 129 [2022-11-19 06:43:53,014 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:43:53,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 113 [2022-11-19 06:43:54,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:43:54,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:54,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:43:54,616 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:43:54,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:43:54,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:43:54,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:54,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:54,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:54,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:54,703 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:54,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:54,734 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:54,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:54,785 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:54,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 69 [2022-11-19 06:43:54,818 INFO L321 Elim1Store]: treesize reduction 37, result has 31.5 percent of original size [2022-11-19 06:43:54,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 57 [2022-11-19 06:43:54,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:54,951 INFO L321 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-11-19 06:43:54,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 84 treesize of output 103 [2022-11-19 06:43:54,990 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 06:43:54,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 88 [2022-11-19 06:43:55,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:55,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:43:55,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:43:55,096 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:43:55,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:43:55,132 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-19 06:43:55,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2022-11-19 06:43:55,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:43:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:55,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:43:55,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:55,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:55,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,424 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-19 06:43:55,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 157 treesize of output 168 [2022-11-19 06:43:55,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:55,445 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:43:55,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 140 [2022-11-19 06:43:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:43:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:43:55,463 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:43:55,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 140 [2022-11-19 06:43:55,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:58,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3666#(and (= |ULTIMATE.start_main_#t~mem12#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#NULL.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4)) 1) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_177| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~x~0#1.base_177|) 0) 0) (= 1 (select |#valid| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (<= 8 (select |#length| |v_ULTIMATE.start_main_~x~0#1.base_177|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~x~0#1.base_177|) 0) 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~x~0#1.base_177|) 4) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem12#1.base|) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (not (= (select |#valid| |ULTIMATE.start_main_#t~mem12#1.base|) 1)) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) (<= |#NULL.base| 0) (<= (+ 8 |ULTIMATE.start_main_~x~0#1.offset|) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 06:43:58,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:58,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:58,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-11-19 06:43:58,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918837200] [2022-11-19 06:43:58,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:58,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 06:43:58,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:58,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 06:43:58,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1581, Unknown=4, NotChecked=0, Total=1806 [2022-11-19 06:43:58,662 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 26 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) [2022-11-19 06:43:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:59,313 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2022-11-19 06:43:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:43:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 26 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) Word has length 21 [2022-11-19 06:43:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:59,314 INFO L225 Difference]: With dead ends: 158 [2022-11-19 06:43:59,314 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 06:43:59,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=252, Invalid=1724, Unknown=4, NotChecked=0, Total=1980 [2022-11-19 06:43:59,316 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 166 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:59,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 562 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 595 Invalid, 0 Unknown, 409 Unchecked, 0.5s Time] [2022-11-19 06:43:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 06:43:59,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 126. [2022-11-19 06:43:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.46) internal successors, (146), 125 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:43:59,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2022-11-19 06:43:59,321 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 21 [2022-11-19 06:43:59,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:59,322 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2022-11-19 06:43:59,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 26 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) [2022-11-19 06:43:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2022-11-19 06:43:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:43:59,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:59,323 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:59,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:59,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:59,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:43:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash 170520484, now seen corresponding path program 1 times [2022-11-19 06:43:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:59,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115693746] [2022-11-19 06:43:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:00,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115693746] [2022-11-19 06:44:00,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115693746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:00,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191700581] [2022-11-19 06:44:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:00,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:00,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:00,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:44:00,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:00,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-19 06:44:00,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:00,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:00,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:00,316 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:44:00,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:44:00,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:00,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:00,464 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:00,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:44:00,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:00,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:44:00,503 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:00,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 06:44:00,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 06:44:00,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:00,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-19 06:44:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:00,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-19 06:44:00,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:00,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:44:00,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:00,759 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:00,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-11-19 06:44:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:00,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:01,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:01,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:44:01,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:01,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:44:01,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:44:01,472 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:01,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-19 06:44:01,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:01,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 06:44:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-19 06:44:01,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:01,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 06:44:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191700581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574555193] [2022-11-19 06:44:01,790 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:44:01,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:01,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:01,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:01,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:01,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:44:01,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:44:01,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:44:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:01,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:44:01,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:01,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:01,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:02,020 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:02,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:44:02,041 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:44:02,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:44:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,081 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:44:02,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:44:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,096 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:44:02,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:44:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 06:44:02,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-19 06:44:02,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,236 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-19 06:44:02,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 348 treesize of output 331 [2022-11-19 06:44:02,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,292 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-19 06:44:02,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 344 treesize of output 347 [2022-11-19 06:44:02,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,334 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 06:44:02,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 372 treesize of output 366 [2022-11-19 06:44:02,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,760 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-19 06:44:02,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 453 treesize of output 350 [2022-11-19 06:44:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:02,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,855 INFO L321 Elim1Store]: treesize reduction 142, result has 19.8 percent of original size [2022-11-19 06:44:02,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 409 treesize of output 392 [2022-11-19 06:44:02,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:02,912 INFO L321 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2022-11-19 06:44:02,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 405 treesize of output 399 [2022-11-19 06:44:03,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:03,032 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:44:03,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 436 treesize of output 353 [2022-11-19 06:44:03,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:03,101 INFO L321 Elim1Store]: treesize reduction 66, result has 30.5 percent of original size [2022-11-19 06:44:03,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 423 treesize of output 425 [2022-11-19 06:44:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:03,129 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:44:03,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 428 treesize of output 410 [2022-11-19 06:44:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:03,337 INFO L321 Elim1Store]: treesize reduction 156, result has 13.8 percent of original size [2022-11-19 06:44:03,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 431 treesize of output 429 [2022-11-19 06:44:03,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:03,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:03,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:03,539 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:03,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 126 [2022-11-19 06:44:03,613 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:03,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 110 [2022-11-19 06:44:04,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:04,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:04,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:04,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:04,650 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:44:04,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:44:04,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:44:04,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:04,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:04,782 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:04,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 126 [2022-11-19 06:44:04,853 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:04,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 110 [2022-11-19 06:44:05,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:05,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:05,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:05,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:05,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:05,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:05,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:08,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4120#(and (= |ULTIMATE.start_main_#t~mem12#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|)) (<= 0 |#NULL.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~x~0#1.base|) (+ |ULTIMATE.start_main_~x~0#1.offset| 4)) 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) |ULTIMATE.start_main_#t~mem12#1.base|) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~x~0#1.base|) |ULTIMATE.start_main_~x~0#1.offset|) 0))) (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~x~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1) (or (not (<= 0 (+ |ULTIMATE.start_main_#t~mem12#1.offset| 4))) (not (<= (+ |ULTIMATE.start_main_#t~mem12#1.offset| 8) (select |#length| |ULTIMATE.start_main_#t~mem12#1.base|)))) (<= |#NULL.base| 0) (<= (+ 8 |ULTIMATE.start_main_~x~0#1.offset|) (select |#length| |ULTIMATE.start_main_~x~0#1.base|)) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 06:44:08,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:08,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:08,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2022-11-19 06:44:08,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577477695] [2022-11-19 06:44:08,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:08,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:44:08,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:08,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:44:08,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1673, Unknown=3, NotChecked=0, Total=1892 [2022-11-19 06:44:08,167 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:09,609 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-19 06:44:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:44:09,610 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 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 [2022-11-19 06:44:09,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:09,611 INFO L225 Difference]: With dead ends: 183 [2022-11-19 06:44:09,612 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 06:44:09,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=333, Invalid=2420, Unknown=3, NotChecked=0, Total=2756 [2022-11-19 06:44:09,613 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 464 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:09,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 572 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1065 Invalid, 0 Unknown, 469 Unchecked, 0.9s Time] [2022-11-19 06:44:09,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 06:44:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 126. [2022-11-19 06:44:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 100 states have (on average 1.45) internal successors, (145), 125 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2022-11-19 06:44:09,617 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 21 [2022-11-19 06:44:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:09,617 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2022-11-19 06:44:09,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2022-11-19 06:44:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:44:09,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:09,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:09,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:09,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:44:09,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:44:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1007861076, now seen corresponding path program 1 times [2022-11-19 06:44:09,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:09,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389325507] [2022-11-19 06:44:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:09,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:44:09,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:09,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389325507] [2022-11-19 06:44:09,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389325507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:09,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432536404] [2022-11-19 06:44:09,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:09,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:09,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:09,971 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:44:10,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:44:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:10,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-19 06:44:10,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-19 06:44:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:44:10,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:44:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432536404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [732551965] [2022-11-19 06:44:10,256 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 06:44:10,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:10,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:10,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:10,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:10,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:44:10,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:44:10,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:10,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:10,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:44:10,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-19 06:44:10,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:10,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:10,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:10,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,468 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 06:44:10,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-19 06:44:10,493 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:10,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:44:10,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:44:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:44:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,545 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:44:10,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:44:10,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-19 06:44:10,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:44:10,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:10,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 52 [2022-11-19 06:44:10,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:10,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:10,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:10,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:10,796 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:10,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 129 [2022-11-19 06:44:10,873 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:10,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 113 [2022-11-19 06:44:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:11,067 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 06:44:11,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-11-19 06:44:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:11,080 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 06:44:11,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-11-19 06:44:11,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:11,173 INFO L321 Elim1Store]: treesize reduction 36, result has 42.9 percent of original size [2022-11-19 06:44:11,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 75 treesize of output 94 [2022-11-19 06:44:11,203 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 06:44:11,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 70 treesize of output 77 [2022-11-19 06:44:11,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:11,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:11,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:11,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:11,385 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:11,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 129 [2022-11-19 06:44:11,457 INFO L321 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2022-11-19 06:44:11,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 113 [2022-11-19 06:44:12,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:12,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-19 06:44:12,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 06:44:13,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:13,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4596#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_main_~x~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1.base| 0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-19 06:44:13,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:13,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:13,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-11-19 06:44:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996865315] [2022-11-19 06:44:13,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:13,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:44:13,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:44:13,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:44:13,802 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:14,045 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2022-11-19 06:44:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:44:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2022-11-19 06:44:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:14,047 INFO L225 Difference]: With dead ends: 132 [2022-11-19 06:44:14,047 INFO L226 Difference]: Without dead ends: 132 [2022-11-19 06:44:14,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:44:14,048 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:14,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 111 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-19 06:44:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2022-11-19 06:44:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 117 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2022-11-19 06:44:14,051 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 21 [2022-11-19 06:44:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2022-11-19 06:44:14,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2022-11-19 06:44:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:44:14,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:14,053 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:14,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:44:14,259 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:44:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:14,260 INFO L85 PathProgramCache]: Analyzing trace with hash 65730771, now seen corresponding path program 1 times [2022-11-19 06:44:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134522931] [2022-11-19 06:44:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:14,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:14,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134522931] [2022-11-19 06:44:14,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134522931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:14,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331179903] [2022-11-19 06:44:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:14,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:14,751 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:14,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:44:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-19 06:44:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:15,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:15,054 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:44:15,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:44:15,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:15,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:15,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:15,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-19 06:44:15,244 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:15,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:44:15,288 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:15,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-11-19 06:44:15,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 06:44:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:15,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:44:15,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:15,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 06:44:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:15,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:15,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:15,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-19 06:44:15,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:15,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-19 06:44:16,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-19 06:44:16,044 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:16,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-11-19 06:44:16,053 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:16,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-19 06:44:16,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:16,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-19 06:44:16,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-11-19 06:44:16,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:16,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 129 [2022-11-19 06:44:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:16,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331179903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:16,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1106656644] [2022-11-19 06:44:16,673 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 06:44:16,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:16,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:16,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:16,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:44:16,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:16,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:44:16,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:16,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:44:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:16,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:16,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:16,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:44:16,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 06:44:16,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2022-11-19 06:44:16,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2022-11-19 06:44:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:16,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:17,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,035 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 06:44:17,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2022-11-19 06:44:17,063 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:17,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:44:17,087 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 06:44:17,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:44:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,113 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:44:17,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:44:17,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:44:17,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-19 06:44:17,208 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:17,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 72 [2022-11-19 06:44:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2022-11-19 06:44:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2022-11-19 06:44:17,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,406 INFO L321 Elim1Store]: treesize reduction 49, result has 31.0 percent of original size [2022-11-19 06:44:17,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 383 treesize of output 351 [2022-11-19 06:44:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:17,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,450 INFO L321 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-19 06:44:17,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 341 treesize of output 327 [2022-11-19 06:44:17,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:17,515 INFO L321 Elim1Store]: treesize reduction 53, result has 25.4 percent of original size [2022-11-19 06:44:17,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 344 treesize of output 337 [2022-11-19 06:44:17,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:17,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:17,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:17,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:17,691 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:20,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5023#(and (or (not (<= (+ |ULTIMATE.start_main_~x~0#1.offset| 4) (select |#length| |ULTIMATE.start_main_~x~0#1.base|))) (not (<= 0 |ULTIMATE.start_main_~x~0#1.offset|))) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~prev~0#1.offset|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:20,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:20,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:20,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 29 [2022-11-19 06:44:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78360139] [2022-11-19 06:44:20,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:20,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-19 06:44:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-19 06:44:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1786, Unknown=7, NotChecked=0, Total=2070 [2022-11-19 06:44:20,875 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:22,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:22,504 INFO L93 Difference]: Finished difference Result 283 states and 317 transitions. [2022-11-19 06:44:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 06:44:22,505 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 06:44:22,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:22,506 INFO L225 Difference]: With dead ends: 283 [2022-11-19 06:44:22,506 INFO L226 Difference]: Without dead ends: 283 [2022-11-19 06:44:22,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=546, Invalid=3737, Unknown=7, NotChecked=0, Total=4290 [2022-11-19 06:44:22,508 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 547 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 464 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:22,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 421 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 687 Invalid, 0 Unknown, 464 Unchecked, 0.6s Time] [2022-11-19 06:44:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-19 06:44:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 135. [2022-11-19 06:44:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 111 states have (on average 1.4054054054054055) internal successors, (156), 134 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 156 transitions. [2022-11-19 06:44:22,513 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 156 transitions. Word has length 23 [2022-11-19 06:44:22,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:22,513 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 156 transitions. [2022-11-19 06:44:22,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 156 transitions. [2022-11-19 06:44:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:44:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:22,514 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:22,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:22,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:44:22,720 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:44:22,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:22,720 INFO L85 PathProgramCache]: Analyzing trace with hash 65730770, now seen corresponding path program 1 times [2022-11-19 06:44:22,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:22,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859292383] [2022-11-19 06:44:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:23,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:23,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:23,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859292383] [2022-11-19 06:44:23,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859292383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:23,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731610138] [2022-11-19 06:44:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:23,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:23,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:23,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:23,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:44:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 06:44:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:23,347 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:44:23,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:44:23,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:23,506 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:23,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-11-19 06:44:23,537 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:44:23,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 06:44:23,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:23,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 06:44:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:23,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:44:23,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:23,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-19 06:44:23,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-19 06:44:23,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-19 06:44:26,723 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:44:26,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 111 treesize of output 381 [2022-11-19 06:44:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:50,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731610138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:44:50,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411028498] [2022-11-19 06:44:50,814 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-19 06:44:50,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:44:50,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:44:50,815 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:44:50,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:44:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-19 06:44:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-19 06:44:50,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:50,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:50,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:50,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 06:44:50,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:50,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 06:44:51,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:51,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-19 06:44:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 40 [2022-11-19 06:44:51,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2022-11-19 06:44:51,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 11 [2022-11-19 06:44:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:51,160 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:51,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 47 [2022-11-19 06:44:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 06:44:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 06:44:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:51,230 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-19 06:44:51,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 46 [2022-11-19 06:44:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,247 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 06:44:51,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 50 [2022-11-19 06:44:51,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-19 06:44:51,334 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:51,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 85 [2022-11-19 06:44:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2022-11-19 06:44:51,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:51,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2022-11-19 06:44:51,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:51,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:51,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-19 06:44:51,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 06:44:51,483 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:44:54,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5662#(and (not (= (select |#valid| |ULTIMATE.start_main_~x~0#1.base|) 1)) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~prev~0#1.offset|) (= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_main_~x~0#1.base| 0)) (not (= |ULTIMATE.start_main_~x~0#1.offset| 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:44:54,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:44:54,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:44:54,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-11-19 06:44:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731887920] [2022-11-19 06:44:54,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:44:54,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:44:54,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:44:54,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1608, Unknown=2, NotChecked=0, Total=1892 [2022-11-19 06:44:54,326 INFO L87 Difference]: Start difference. First operand 135 states and 156 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:54,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:54,839 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2022-11-19 06:44:54,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:44:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-19 06:44:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:54,841 INFO L225 Difference]: With dead ends: 162 [2022-11-19 06:44:54,841 INFO L226 Difference]: Without dead ends: 162 [2022-11-19 06:44:54,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=340, Invalid=2010, Unknown=2, NotChecked=0, Total=2352 [2022-11-19 06:44:54,842 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 103 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:54,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 297 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 447 Invalid, 0 Unknown, 275 Unchecked, 0.3s Time] [2022-11-19 06:44:54,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-19 06:44:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2022-11-19 06:44:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 110 states have (on average 1.4) internal successors, (154), 133 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 154 transitions. [2022-11-19 06:44:54,851 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 154 transitions. Word has length 23 [2022-11-19 06:44:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 154 transitions. [2022-11-19 06:44:54,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:44:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 154 transitions. [2022-11-19 06:44:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:44:54,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:54,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:44:54,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-19 06:44:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:44:55,060 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-19 06:44:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 2109357507, now seen corresponding path program 2 times [2022-11-19 06:44:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:55,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106253278] [2022-11-19 06:44:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:55,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:55,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106253278] [2022-11-19 06:44:55,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106253278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:55,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452415775] [2022-11-19 06:44:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:44:55,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:55,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:55,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39956e90-b103-4e3c-9468-4dbde3e88a60/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:44:55,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:44:55,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:44:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-19 06:44:55,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:55,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 06:44:55,926 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:44:55,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 06:44:55,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:55,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 06:44:56,033 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 06:44:56,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-11-19 06:44:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:44:56,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 06:44:56,098 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-19 06:44:56,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 70 [2022-11-19 06:44:56,113 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 06:44:56,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 52 [2022-11-19 06:44:56,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:44:56,388 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 06:44:56,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 53 [2022-11-19 06:44:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:44:56,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:45:11,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2758 treesize of output 2742 [2022-11-19 06:45:13,296 INFO L321 Elim1Store]: treesize reduction 591, result has 51.0 percent of original size [2022-11-19 06:45:13,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 884986 treesize of output 838500 [2022-11-19 06:46:12,872 WARN L233 SmtUtils]: Spent 59.57s on a formula simplification. DAG size of input: 1103 DAG size of output: 1080 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:46:16,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:46:16,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 975517 treesize of output 852827 [2022-11-19 06:46:21,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-19 06:46:23,266 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:23,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:24,300 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:46:24,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 73 [2022-11-19 06:46:25,379 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:25,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:28,306 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:28,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:34,101 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:36,166 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:46:36,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 73 [2022-11-19 06:46:38,015 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:38,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:39,615 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:46:39,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 73 [2022-11-19 06:46:40,232 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-19 06:46:40,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 123 [2022-11-19 06:46:41,184 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-19 06:46:41,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 107 [2022-11-19 06:46:44,969 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:44,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:46,771 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:46,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:47,389 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:47,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 95 treesize of output 75 [2022-11-19 06:46:48,225 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-19 06:46:50,809 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:50,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:51,756 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 95 treesize of output 75 [2022-11-19 06:46:52,551 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:52,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:53,914 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:53,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:46:55,394 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-19 06:46:55,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 304 treesize of output 310 [2022-11-19 06:46:58,911 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:58,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 117 [2022-11-19 06:46:59,270 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:46:59,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 117 [2022-11-19 06:46:59,782 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:46:59,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 211 treesize of output 1 [2022-11-19 06:47:00,525 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:00,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 185 treesize of output 155 [2022-11-19 06:47:01,286 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:01,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 117 [2022-11-19 06:47:03,743 INFO L321 Elim1Store]: treesize reduction 54, result has 39.3 percent of original size [2022-11-19 06:47:03,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 143 treesize of output 155 [2022-11-19 06:47:06,489 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:06,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:47:07,086 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:07,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:47:07,276 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:07,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:47:07,554 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-19 06:47:08,007 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-19 06:47:09,628 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:47:09,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 131 [2022-11-19 06:47:10,939 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:47:10,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 73 [2022-11-19 06:47:13,233 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:47:13,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 131 [2022-11-19 06:47:18,335 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:18,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 137 treesize of output 117 [2022-11-19 06:47:18,682 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:18,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:47:20,342 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-19 06:47:20,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 69 treesize of output 59 [2022-11-19 06:47:21,010 INFO L321 Elim1Store]: treesize reduction 88, result has 1.1 percent of original size [2022-11-19 06:47:21,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 73 [2022-11-19 06:48:02,404 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 931 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:50:10,588 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 848 DAG size of output: 848 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 06:56:41,096 WARN L233 SmtUtils]: Spent 7.43s on a formula simplification. DAG size of input: 848 DAG size of output: 848 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)